Twin Turbo Blow Through 300

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AlphaZ
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Twin Turbo Blow Through 300

Post #1 by AlphaZ » Wed Oct 26, 2016 7:37 am

This is not a proposed project, it's a project I just finished, I had been documenting my progress on a different forum, I wanted to get on this one and put all the information I know about this project down on this forum for others to learn from my mistakes.
I will post again after work when I get more time to do this. Until then, a link to the exhaust noise! :D

[youtube]https://www.youtube.com/watch?v=LAy2bYZidRI[/youtube]
Vehicle:
'69 F100 with TwinTurbo 300-6

deere114
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Re: Twin Turbo Blow Through 300

Post #2 by deere114 » Thu Oct 27, 2016 11:32 am

I've been watching your thread on FTE. How's tuning the blow through going? Get it in boost yet?

AlphaZ
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Re: Twin Turbo Blow Through 300

Post #3 by AlphaZ » Thu Oct 27, 2016 9:47 pm

I haven't gotten boost going, I was dealing with the fuel pump sucking in rust from the tank. Couldn't get more than a couple miles. Just finished and took it to town tonight for a test run.
I'm waiting on a part for my throttle cable because at the moment I can only go part throttle, secondaries won't even open yet. But the turbos whistle like you wouldn't believe. Definitely gets attention from other people.
I've never tuned with an AFR Gauge before, I'm playing it very cautiously and watching it like a madman. I've been keeping it between 11:1 and 14:1. I'm curious as to what will happen when the methanol/water injection kicks in also.
I know I said I would have updated by now and put down all of the information I've learned, I need to wait til the weekend so I can take the time and sort through everything.
Vehicle:
'69 F100 with TwinTurbo 300-6

deere114
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Re: Twin Turbo Blow Through 300

Post #4 by deere114 » Thu Oct 27, 2016 10:31 pm

I know from tuning megasquirt how time consuming that can be. I like to play things safe and dial them in slowly. I've never tuned a blow through carb before so I'm very interested to see how it works out for you. It sounds very nice in that video you posted, curious to see how those wrx turbos work out for you.

AlphaZ
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Re: Twin Turbo Blow Through 300

Post #5 by AlphaZ » Sat Oct 29, 2016 9:11 am

Took it cruising last night, I've got the throttle worked out where I can run 4psi of boost. Also filled my methanol tank.

Holy crap. It really pushes a guy into the seat.

Just 4psi is a whole lot of fun. I need to keep an eye on when it hits but I think it spools below 2000rpm.

People were driving by going "Farm Truck!". It's pretty obvious even when I can hear the turbo whistle echoing off buildings. I had a crowd of lookie loos checking out the engine when I parked it haha.

My throttle is set where the primaries are open and the secndaries are just cracked open.

I'm borrowing my mom's Go Pro today and I'll take a video as it sits until I get more throttle stuff in the mail.
Vehicle:
'69 F100 with TwinTurbo 300-6

deere114
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Posts: 295
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Re: Twin Turbo Blow Through 300

Post #6 by deere114 » Sat Oct 29, 2016 10:37 am

Looking forward to that video for sure! I'm going to try a tp38 off a 94-97 powerstroke on my truck. Mustang guys say boost hits hard 2800-3200 with the huge 1.15 a/r. I bought a .84 a/r housing in an effort to get spool around 2000 we will see. If that doesn't work I might look into those wrx units your running. Wonder what back pressure will be like with those. What're your cam specs by the way? In the video sounds like it's got a little chop to it, that could just be my crappy phone speaker though.

AlphaZ
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Re: Twin Turbo Blow Through 300

Post #7 by AlphaZ » Sat Oct 29, 2016 2:45 pm

From compcams, 212/212, 114deg LSA.

It has a smooth idle, no chop to it, when it raps out it sounds a little bit like a ricer. Good low-mid torque though.

Even without full throttle and 4psi, it'll squeal tires when it spools up in first gear.
Vehicle:
'69 F100 with TwinTurbo 300-6

deere114
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Posts: 295
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Re: Twin Turbo Blow Through 300

Post #8 by deere114 » Sat Oct 29, 2016 6:52 pm

looking forward to seeing what it does full throttle :thumbup: h

AlphaZ
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Re: Twin Turbo Blow Through 300

Post #9 by AlphaZ » Sun Oct 30, 2016 10:48 am

Ok I'm going to attempt to compile everything...

Engine:
EFI 300/4.9L inline six Pulled from 1987 F-150
Rebuilt and bored .060” over
Hypereutectic pistons, 8.5:1 compression
ARP main bearing studs and line honed
crank straightened to within .002”
custom ground turbo cam from comp cams, Duration @ .050” is 212/212, Lift is .447/.447, LSA is 114
Steel cam gear
ARP head studs
Stellite high temperature valves (propane valves)
Crane Pedestal to stud rocker conversion kit
High volume oil pump
Heavy duty 300 head gasket, Felpro 1024.
Offenhauser Dual Plane intake manifold

Turbos:
2x TD04-13T turbochargers, Part Number: 49377-04300 and 14412AA360
The 04300 is the oem TD04 on the 02-04 WRX / 2.0L.

Fuel:
Old Holley 600cfm double pumper converted to blow-through by following Hangar18 instructions.
Aeromotive boost-referenced return-style fuel pressure regulator.
Snow Performance stage 1 Methanol/Water injection kit.

OKKKK Pictures.

One of the most frustrating issues I encountered was the main stud clearance to the oil pump. I had to have a spacer made and a longer oil pump shaft.
Image
And this:
Image
It's something I never ran across while visiting forums and looking at what other members had to say.

Here's a mock up before all the piping:
Image

This is what the hand-made headers look like before they were ceramic coated:
Image
The biggest struggle with making these was making sure I could get a ratchet in there and tighten my manifold bolts.

Here's the headers after Jet-Hot coated them:
Image
Did a pretty slick job on it, it's kind of a sandpaper feel, it's their 2000F coating.
Image

And finally, here's the mock up when I fitted all the piping
Image

I hope I got everything in one go, instead of adding more posts on additional info I'm going to edit this one and keep it all in one spot.
Vehicle:
'69 F100 with TwinTurbo 300-6

AlphaZ
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Posts: 29
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Re: Twin Turbo Blow Through 300

Post #10 by AlphaZ » Sun Oct 30, 2016 7:17 pm

Just took a video, trying to figure out how to edit it.... I'll upload soon
Vehicle:
'69 F100 with TwinTurbo 300-6

AlphaZ
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Posts: 29
Joined: Mon Oct 24, 2016 10:35 pm

Re: Twin Turbo Blow Through 300

Post #11 by AlphaZ » Sun Oct 30, 2016 9:21 pm

Ok, sorry about the horrible audio and video quality, hopefully you can see what's up on there.
Rolling start, pretty much floored to 70mph.
I think I need a boost controller to raise the pressure, I'm supposing the wastegate is going partially open at WOT.

https://youtu.be/qT2A4jaLd1Y
Vehicle:
'69 F100 with TwinTurbo 300-6

deere114
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Posts: 295
Joined: Thu Sep 19, 2013 7:57 pm

Re: Twin Turbo Blow Through 300

Post #12 by deere114 » Mon Oct 31, 2016 10:36 am

I'll have to watch that later on the computer, can't see much on my phone. Looking forward to seeing what it does with more boost! Looks like your running 13.0 afr ratio at 5psi, may need a jet change with more boost

AlphaZ
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Re: Twin Turbo Blow Through 300

Post #13 by AlphaZ » Mon Oct 31, 2016 10:39 am

Yea you'll need to watch at 1080 to see the needles, I'll do a better recording next time
Vehicle:
'69 F100 with TwinTurbo 300-6

guhfluh
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Posts: 263
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Re: Twin Turbo Blow Through 300

Post #14 by guhfluh » Sun Nov 13, 2016 4:54 pm

Yes, it's very lean in boost. Shoot for no higher than high 11s AFR. The 13's and even 14+AFR you have in boost now is good for N/A, but dangerous in boost.
1967 F-250 Crew Cab 2wd, 300 6cyl, T-170/RTS/TOD 4-speed overdrive
240 head, Offy C, EFI exhaust manifolds, Comp 268H, mandrel 2.5-3" exhaust, Edelbrock 500, Pertronix ignitor and coil, recurved dizzy. 200whp/300wtq

AlphaZ
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Re: Twin Turbo Blow Through 300

Post #15 by AlphaZ » Wed Nov 16, 2016 5:47 pm

Well I got the lean spike out and have my boost set to 10psi.
Road raced a guy in the quarter, I don't have a time but I crossed the finish at around 95mph.
There's a few more improvements to make yet.
Vehicle:
'69 F100 with TwinTurbo 300-6

guhfluh
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Posts: 263
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Re: Twin Turbo Blow Through 300

Post #16 by guhfluh » Wed Nov 16, 2016 6:31 pm

Your carb doesn't look like a mechanical secondary "double pumper" Holley, it looks like a normal vacuum secondary in the pictures. How is that working out?

I'm considering using an Edelbrock 500 I have. It seems like the modifications to it for boost should be very easy, especially under 15psi., as you wouldn't even need to swap to solid floats.

As for the main stud to oil pump clearance issue, I had seen where they ground the stud down flush with the nut and may have even taken some off the nut, then clearance the pump some with some grinding and it was enough to fit without a spacer.

You talk about using a throttle cable and I see you are using a Dual Port manifold with the carb turned. What did you use for a throttle cable setup on your truck? How did you get one installed with the stock pedal arm? I'd love to convert to one and turn my carb.

Also, what are you doing/using to control spark timing?

With a 95mph trap speed, as long as you had a decent launch and didn't just burn the tires down, it's good enough for mid to high 14's in the quarter. Not bad at all.

It's nice to see more people playing with boosting these engines!
1967 F-250 Crew Cab 2wd, 300 6cyl, T-170/RTS/TOD 4-speed overdrive
240 head, Offy C, EFI exhaust manifolds, Comp 268H, mandrel 2.5-3" exhaust, Edelbrock 500, Pertronix ignitor and coil, recurved dizzy. 200whp/300wtq

AlphaZ
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Posts: 29
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Re: Twin Turbo Blow Through 300

Post #17 by AlphaZ » Thu Nov 17, 2016 7:24 am

guhfluh wrote:Your carb doesn't look like a mechanical secondary "double pumper" Holley, it looks like a normal vacuum secondary in the pictures. How is that working out?

I'm considering using an Edelbrock 500 I have. It seems like the modifications to it for boost should be very easy, especially under 15psi., as you wouldn't even need to swap to solid floats.

As for the main stud to oil pump clearance issue, I had seen where they ground the stud down flush with the nut and may have even taken some off the nut, then clearance the pump some with some grinding and it was enough to fit without a spacer.

You talk about using a throttle cable and I see you are using a Dual Port manifold with the carb turned. What did you use for a throttle cable setup on your truck? How did you get one installed with the stock pedal arm? I'd love to convert to one and turn my carb.

Also, what are you doing/using to control spark timing?

With a 95mph trap speed, as long as you had a decent launch and didn't just burn the tires down, it's good enough for mid to high 14's in the quarter. Not bad at all.

It's nice to see more people playing with boosting these engines!


That was just a 390 holley vacuum secondary I was using to mock up everything to make sure stuff cleared. I was waiting on gaskets for the dp at the time.

I never looked into using an edelbrock for blow through, I've kind of been holley ever since I started doing this performance stuff.

I'll take a picture of how I have my throttle set up, it's a little mickey mouse but it works. As they say, if it works, it ain't stupid. haha.

I got a regular vacuum advance dizzy, timed the static to 8-9deg, and left that like normal. I know that there's very differing opinions, but I have my vacuum advance hooked up to manifold vacuum. Partly because the carb is old enough it doesn't have a ported vacuum on it.

I got a MSD 6 BTM and it pulls timing when engine is under boost. When I started, I was pulling 2deg per psi. Now, it's a little colder and I'm a little braver so I'm only pulling 1deg per psi.
Vehicle:
'69 F100 with TwinTurbo 300-6

Sick6Turbo
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Location: Almond, Wi.

Re: Twin Turbo Blow Through 300

Post #18 by Sick6Turbo » Fri Nov 25, 2016 10:40 pm

guhfluh wrote:Yes, it's very lean in boost. Shoot for no higher than high 11s AFR. The 13's and even 14+AFR you have in boost now is good for N/A, but dangerous in boost.


:nod: ... More power when richer as well.
Dale
79 F-100 turbocharged 300 rear mount 20 psi
Stock EFI bottom end, mild port carb head
12.44@106 1/4 mile in 2015

AlphaZ
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Re: Twin Turbo Blow Through 300

Post #19 by AlphaZ » Sat Nov 26, 2016 10:10 am

Yea, I forgot to post that I got the tuning taken care of, it's running richer like it's supposed to. Bumped my boost to 10 psi, I'm happy with where it's at right now.
Just doing some quarter miles lately to estimate horsepower. I don't know the error on those little calculators that use MPH/Weight on the quarter mile to estimate how much power it's making, but I'm hoping it'll get me in the ball park.

My current issue is keeping traction. I don't have the money to get a locker for the rear end. I've got the old Ford 3 speed in it and in first gear there's no chance of grip once it spools. In second gear it chirps a bit.

On wet pavement it's best to just keep my foot out of it, it'll lose traction in any gear once the pressure goes positive.
Vehicle:
'69 F100 with TwinTurbo 300-6

Sick6Turbo
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Posts: 61
Joined: Sat Dec 19, 2015 12:53 pm
Location: Almond, Wi.

Re: Twin Turbo Blow Through 300

Post #20 by Sick6Turbo » Sat Nov 26, 2016 2:23 pm

This calc is what I use, seems very accurate. It estimated 488hp flywheel for the v6 tbird, and it wheel dynoed at 452hp the next week.
http://www.wallaceracing.com/hpcalculatorquarter.php

My F100 sleeper (sold to my brother Will) still has a stock wore out locker that one wheel peeled all the time. Use traction bars and sticky tires and weight in the rear, and work on the suspension until it posi's on it own. When it does, the suspension is set up correctly.

Just before I pulled the 300 out, I had stock/street all terrain shot tires on it, and when boosted around 20 mph, it never broke them loose the way the truck is set up. Estimated 450+hp and 700tq at that time.

The F100 sleeper has 2.75 gears in it, and the v6 tbird started with 2.73's, ran this year with 3.08's, and will go back to 2.73's next year to help with traction.
Dale
79 F-100 turbocharged 300 rear mount 20 psi
Stock EFI bottom end, mild port carb head
12.44@106 1/4 mile in 2015

Sick6Turbo
Registered User
Posts: 61
Joined: Sat Dec 19, 2015 12:53 pm
Location: Almond, Wi.

Re: Twin Turbo Blow Through 300

Post #21 by Sick6Turbo » Sun Nov 27, 2016 9:53 am

Very cool build by the way! Nice job taking an unbalanced scheme with the 300 layout and giving it balance.

Keep up the good work, these turbo torque monsters are a blast. 8)
Dale
79 F-100 turbocharged 300 rear mount 20 psi
Stock EFI bottom end, mild port carb head
12.44@106 1/4 mile in 2015

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