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Anonymous
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Can this be true 28% more hp with cliffords dual headers, port divider and a x pipe? I can wait for my Falcon hand book to get here. i hope it will show what you can get with differnt combos.
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Anonymous
Guest
Holy pickled eggs batman! if that's so, let me know!!! I'm planning on new headers and wanted to know what make to get...
Short answer, no.
If you upgrade the carb, distributor and cam at the same time--sure. The way that manufacturors come up with their figures is somewhat suspect. They usually use an already modified engine with stock manifolds vs. headers. Obviously then the manifold is the lowest-flowing piece and big benefits are seen by headers.
If you upgrade the carb, distributor and cam at the same time--sure. The way that manufacturors come up with their figures is somewhat suspect. They usually use an already modified engine with stock manifolds vs. headers. Obviously then the manifold is the lowest-flowing piece and big benefits are seen by headers.
80Stang
Well-known member
That is not necessarily too far wrong.
I scored 35% gain (if we consider stock is really 83hp) with my first engine buildup, which practically was only these three mods on a '80 stock package:
1. FSPP headers (single out, ceramic coated) + Clifford divider
2. Comp Cams 260H cam
3. Head milled 0.083" (1.6mm)
I scored 35% gain (if we consider stock is really 83hp) with my first engine buildup, which practically was only these three mods on a '80 stock package:
1. FSPP headers (single out, ceramic coated) + Clifford divider
2. Comp Cams 260H cam
3. Head milled 0.083" (1.6mm)
I can see a 25% gain.....when you are starting with a low number a large percentage gain is only really a small numerical gain....
28% x 80hp = 23hp gain I could see this on a 200 running stock exhaust and all but this gain would be at the peak only and not across the board and most likely would be giving up some low end power (loss of backpressure form better muffler as I assume that would be changed too)
28% x 80hp = 23hp gain I could see this on a 200 running stock exhaust and all but this gain would be at the peak only and not across the board and most likely would be giving up some low end power (loss of backpressure form better muffler as I assume that would be changed too)
With just a (dual out) header on a stock 200 motor, you will get a quieter exhaust, marginal fuel economy lift and that's about it. I've tried it. You get more punch with a proper electronic ignition (not Pertronix, but a rebuilt electronic distributor) attached to manifold vacuum. That also adds economy.
Regards, Adam.
Regards, Adam.
Huntingbuck
Your Handbook is on its way.
As for 28% gain on a stock 200 - No Way!
Even on a fully modified 200 that would be a stretch.
Swap to DSII ignition; find a bigger carb, mill the head (cut the intake valves too) and then the headers will have something to work with.
On the other hand, if you have a good deal on the headers, it certainly hurt to add them first. They will help a little, and they cetainly look neater than a cast log exhaust at cruise night
Good Luck
Your Handbook is on its way.
As for 28% gain on a stock 200 - No Way!
Even on a fully modified 200 that would be a stretch.
Swap to DSII ignition; find a bigger carb, mill the head (cut the intake valves too) and then the headers will have something to work with.
On the other hand, if you have a good deal on the headers, it certainly hurt to add them first. They will help a little, and they cetainly look neater than a cast log exhaust at cruise night
Good Luck
I agree, no way is a header going to give you a 28% gain on a stock motor. Not even the ones I stock. We plan to do some extensive dyno testing in the next month or two, starting with a bone stock 200 for comparison. Here's a run down on our plans. After each set, we will leave the part(s) that yeild the most gain.
HEADERS: We plan to start our testing with headers, using the three I stock, one of Cliffords, and possibly one other. I'm under the assumption that there won't be any difference in gains, from one to the other, on a stock build, And that the most we will see is about 10-12%.
CAM: We will dyno several cams, using the header that puts out the best gain on the stock motor. This will give us a good baseline on a mild build with a cam, headers, and a port divider.
DIZZY: Next, we will test the four ignition systems on the above setup. A stock dizzy, the Petronics, the DSII/MSD, and the new DUI.
ROCKERS: On the next set of runs, we will dyno the various rocker systems. Stock 1.5 adjustables, High ratio 1.6 adjustables, the 1.6 roller tipped, and the 1.65 full roller rockers.
CARB: We plan to dyno a stock log, a modified log, a direct mount Holley, and the OZ head. We will also dyno the new aluminum head (with a 2V & 4V) if the head and intakes are ready in time.
INDUCTION: The last set of runs will test the various setup's we paln to offer for the new aluminum heads. Including 2V, 4V, 2x2V, 3X2V, trubo 2V & 4V, EFI with 4V, twin TBI's & triple TBI's (both N/A and boosted), and finally the M90 with the various options. This last set of runs will propably happen over a period of time, as we will need to wait for those that are still in the R&D stages.
Did I miss anything?
As we go along, we will build a table showing the results and post it on the FSPP website. Should be very interesting to see the results of each modification. No more guessing.
HEADERS: We plan to start our testing with headers, using the three I stock, one of Cliffords, and possibly one other. I'm under the assumption that there won't be any difference in gains, from one to the other, on a stock build, And that the most we will see is about 10-12%.
CAM: We will dyno several cams, using the header that puts out the best gain on the stock motor. This will give us a good baseline on a mild build with a cam, headers, and a port divider.
DIZZY: Next, we will test the four ignition systems on the above setup. A stock dizzy, the Petronics, the DSII/MSD, and the new DUI.
ROCKERS: On the next set of runs, we will dyno the various rocker systems. Stock 1.5 adjustables, High ratio 1.6 adjustables, the 1.6 roller tipped, and the 1.65 full roller rockers.
CARB: We plan to dyno a stock log, a modified log, a direct mount Holley, and the OZ head. We will also dyno the new aluminum head (with a 2V & 4V) if the head and intakes are ready in time.
INDUCTION: The last set of runs will test the various setup's we paln to offer for the new aluminum heads. Including 2V, 4V, 2x2V, 3X2V, trubo 2V & 4V, EFI with 4V, twin TBI's & triple TBI's (both N/A and boosted), and finally the M90 with the various options. This last set of runs will propably happen over a period of time, as we will need to wait for those that are still in the R&D stages.
Did I miss anything?
As we go along, we will build a table showing the results and post it on the FSPP website. Should be very interesting to see the results of each modification. No more guessing.
A
Anonymous
Guest
Sounds like fun to me!! 
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