turbo carb suggestions
- Thread starter mustube
- Start date
Something fairly small. Typically blow-through installations require a carb only slightly larger than stock.
Many will say the 350 cfm holley 2 bbl carb.
A
Anonymous
Guest
Don't overlook the Autolite 2100 series, they have many benefits.
I scored a 2100 motorcraft (I think it is a 109) at a local swapmeet for $3 last weekend...it has no choke though....perfect for a blowthrough carb. need to kit it still if it even needs it.
8)
I was recently given a Holley 2300 350cfm 2bbl. and a Holley rebuild kit. I intend to have it rebuilt for a turbo application.
IIRC you have to make sure all the seals and bushings are good and use a Nitrophyl float that wont collapse under boost.
I was recently given a Holley 2300 350cfm 2bbl. and a Holley rebuild kit. I intend to have it rebuilt for a turbo application.
IIRC you have to make sure all the seals and bushings are good and use a Nitrophyl float that wont collapse under boost.
A
Anonymous
Guest
The pros of the 2100:
1) Most already have nitrophyl floats
2) Most have a 5/16 air cleaner stud.
The 1/4" air cleaner stud in the Holley tends to strip out.
3) Uses std Holley power valves (and sometimes accel pump diaphrams)
4) Annular discharge venturis come stock. These work better boosted than regular booster venturis.
5) The top comes off the carb, not the bowl off of the side like a Holley.
No fuel bowls leaks.
6) Cheap
7) easy to find, easy to get parts/kits for
Cons:
1) Single inlet needle and seat,
not very large (HP limited) unless you add extra fuel to the bowl with a fuel solenoid like I had to with my 1-bbl. carb.
This may be a limit, maybe not. Depends on how much fuel you need to flow. Boosted engines do need a lot of fuel flow to make the HP. I was really, really surprised how much fuel I needed to have flowing through my 1-bbl. ALTHOUGH, the single needle and seat in the 2100 is QUITE a bit larger than the one in my little model 1946 carb.
2) Uses "weird" autolite jets.
It would be nice if Holley jets threaded in. Not really a big deal.....I have had to drill jets on other carbs in my life. If you go too big, you have to solder them shut and re-drill a new hole.
Did I miss anything?
Where can you get an appropriate float?
They usually come stock with a nitrphyl float
What other parts would be needed to get a 2100 to NOT spit gas everywhere?
I have had that problem with a LOT of Holleys.
I have never had a gas spray/stuck float problem with a 2100
1) Most already have nitrophyl floats
2) Most have a 5/16 air cleaner stud.
The 1/4" air cleaner stud in the Holley tends to strip out.
3) Uses std Holley power valves (and sometimes accel pump diaphrams)
4) Annular discharge venturis come stock. These work better boosted than regular booster venturis.
5) The top comes off the carb, not the bowl off of the side like a Holley.
No fuel bowls leaks.
6) Cheap
7) easy to find, easy to get parts/kits for
Cons:
1) Single inlet needle and seat,
not very large (HP limited) unless you add extra fuel to the bowl with a fuel solenoid like I had to with my 1-bbl. carb.
This may be a limit, maybe not. Depends on how much fuel you need to flow. Boosted engines do need a lot of fuel flow to make the HP. I was really, really surprised how much fuel I needed to have flowing through my 1-bbl. ALTHOUGH, the single needle and seat in the 2100 is QUITE a bit larger than the one in my little model 1946 carb.
2) Uses "weird" autolite jets.
It would be nice if Holley jets threaded in. Not really a big deal.....I have had to drill jets on other carbs in my life. If you go too big, you have to solder them shut and re-drill a new hole.
Did I miss anything?
Where can you get an appropriate float?
They usually come stock with a nitrphyl float
What other parts would be needed to get a 2100 to NOT spit gas everywhere?
I have had that problem with a LOT of Holleys.
I have never had a gas spray/stuck float problem with a 2100
8)
What kind of airflow is the 2100 rated at and how much horsepower will it support approximately?
What kind of airflow is the 2100 rated at and how much horsepower will it support approximately?
A
Anonymous
Guest
Anlushac11":5n02oamq said:
Good questions.
The ones with 1.21 stamped on the side are supposed to be about 300-350 cfm or thereabouts. I chose to modify a 1.08 carb because it was not so much larger than my 1-bbl and I wanted better throttle response (not being over-carbed)
A smaller carb is easier to tune for blow-through than one that is too large.
Of course, life is full of surprises, so I don't know if that is the case unless I got the chance to test the different sizes..
Any model 2100 will flow enough air to get you over 400 HP in a blow-through application.
HP support depends on fuel flow, I am not sure what the needle and seat would flow. My 1-bbl had a .070" inlet if I remember correctly, and the 2100 looks to be about .100" or .110" (without measuring it)
Holley offers inlet needles in .110", .120" for more fuel flow on high HP engines, but of course they are only for Holleys. If I needed more fuel flow, I could always do the fuel solenoid trick like I did on my 1-bbl.
A
Anonymous
Guest
I am actually looking for the exact same thing ... I have big plans for my little six, and need to take little steps first.
I am planning on changing out the carb first, but I want to make sure it matches what I want. I plan on getting the Aluminum head, and putting a turbo on. I want to get as much low end power as I can out of it (don't know if that makes a difference, but I figured I should include it).
1.) Where could I get an adaptor for either of the carbs to hook it up to the log head?
Are any of these good quality and what I am looking for?
http://cgi.ebay.com/ebaymotors/Holley-m ... dZViewItem
http://cgi.ebay.com/ebaymotors/Holley-0 ... dZViewItem
http://cgi.ebay.com/ebaymotors/Ford-Aut ... dZViewItem
Would a 300 cfm one work better?
*****I apologize for "jacking" this thread, it was just the exact same question I was going to ask, If you would like I will delete the post and create my own thread**********
I am planning on changing out the carb first, but I want to make sure it matches what I want. I plan on getting the Aluminum head, and putting a turbo on. I want to get as much low end power as I can out of it (don't know if that makes a difference, but I figured I should include it).
1.) Where could I get an adaptor for either of the carbs to hook it up to the log head?
Are any of these good quality and what I am looking for?
http://cgi.ebay.com/ebaymotors/Holley-m ... dZViewItem
http://cgi.ebay.com/ebaymotors/Holley-0 ... dZViewItem
http://cgi.ebay.com/ebaymotors/Ford-Aut ... dZViewItem
Would a 300 cfm one work better?
*****I apologize for "jacking" this thread, it was just the exact same question I was going to ask, If you would like I will delete the post and create my own thread**********
