Running fuel heads on alcohol motor

Hello, Has anyone had any luck running older fuel heads on an alcohol motor? I have tried to get into the 6 second zone for 2 years and am finally admitting defeat! I have a nice set of Brad 5 heads and am putting that combo together now. The only really obvious difference is the 175 cc chamber vs the B5 at around 105. Does this make that much difference if you are running the correct compression? I have 11.5 compression. Yes it is a big dome to put in a big chamber. But when I look at the parts I have been running it just seems like I should have been running stronger.

4.375 bore 3.75 stroke
14-71 HH retro 50% over (45 pounds) set back 4.5 inches
296/500 cam
4.56 with 17/36 rubber
older TAFC now running a powerglide
Best ET was 7.25 @ 190 some thing

A couple guys thought the cam was to big. I would love to hear from others. Thanks Bill

PS I am looking for a manifold for this new set up. Half inch short deck to Brad 5. Thanks!

 

Top Fuel heads on Alcohol

We found out enough boost made the top fuel heads work real good. I helped with the same combo you are running and we went 3.80s nearly anywhere we went in a dragster like yours. Now, 6 years later the same car and combo are running 6.00s in T/D now and it had to be slowed down some to keep from breaking out and going in the 5s. Your tuneup with that much boost should easily run very good. We switched to the Fatheads and I do not see any difference if you keep the revs low like we do at 7600rpm to save engine parts and never any motor problems either and always ran a Powerglides too. Message me here and send me your e-mail and I if can help, will help in any way that I can. The fathead is still new to me and I have been a 3.98 so far but in a heavier car too at 2600lbs. I am having to figure a new tuning program now. Thanks, Jim from TN
931-580-8804

 

Thanks Jim! Nice talking to you! Check out the web site billfuchsmotorsports.com

 

I WILL SECOND WHAT jIM IS TELL YOU WE RUN REAL FAST WITH FUEL HEADS.dAVE

 

timing?

Maybe a timing issue. How much timing have you run with those fuel heads? I read on this site not too long ago that fuel heads on alcohol need quite a bit more timing to run right. Maybe others who run fuel heads on alcohol can supply you with a better timing number.

 

We run veney fuel heads on our 526 motor,14-71 h/h retro @ 32%,30degrees timing with a 44 mag,30lbs max boost max rpm we go to is 7800,have run 6.9's in a funny car and 6.4's in the rail we now running(b&j/clutch driveline) these numbers are on very fat tuneups,I know alot of teams over here running both bae and veney fuel heads that have run quicker than us,with the fuel heads you can get away with running more timing I have gone as high as 36degrees with the 44 but our motor seems real happy with only 30 in it,we bracket race with our car so not pushing it to its max,I'm confident that if I tuned it up sum more it'll run a high 5 !!

 

32 degees was max for us with a 44 mag

Bill, this is Jim again and I think your converter is way to tight killing you and we ran 32 degrees without hurting anything, but 34 and up; we loosened bolts and we knew to back back down to 32 and ran the same motor 6 years and now it is running T/D at 6.00s and still going strong with no problems ever-THANKS! Jim from TN

 

at the hit we run 36deg. then take 2 deg out then another 2 deg. out end up through the lights with 32 deg.Dave also this is with 2 mallory mag 4's

 

I remember this guy named Pat Austin that ran fuel heads......he did ok
Darren

 

Our TA/FC ran 6.04 @233.7 with BAE fuel heads 23 years ago. That is all we had back then and today's superchargers are much better than what we had. So yes

 

timing fuel heads

Well you guys will think i am crazy. In my engine we run 39 degrees with a 44 pro mag. The engine is AJPE stage 2 heads.

 

Again, compression, boost and car weight/load??????

Again, compare compression ratio with boost and the load on the motor, weight of the chassis and the gearing also, and how much of a load is on the motor, and we ran 46lbs of boost with a Chuck Ford Kobelco Superman and always had to run lower timing (32 degrees) to keep from hurting rod bearings, but never any problems and still went pretty fast-THANKS! Jim

 

Timing Number?

Hey Bill,
What amount of timing DO you run? What timing have you tried that didn't help? Thanks

 

Bill , what size pump are you running on this ?

 

Did you have any problems with tire shake? We ran fuel heads after destroying our alcohol heads, and couldn't get them to work until I added exactly 1.0 gallons to the fuel system.

 

Fuel Heads

Hi, Jim (Blown5402) can help you out, he is a good friend and can help you a lot with that deal.

The trick with the fuel heads is that they need more timing (30-36 degrees I have heard) than the fatheads because of the bigger combustion chambers, they also don't like heavy rpm's because of the heavy pistons. The good news is they make great power even with the reduced rpm, especially in converter applications. That cam is often used in 500+cid roots and screw blower applications. On your app I would if its the 116 centerline deal I would install it between 34-35 degrees but it may be a bit big for that cid but I would think you would still be in the 6's in a light car. That motor depending on the overall car combo should run low 6's with no problems if its a light dragster or altered. The last car I tuned on went 6.20's with a 23 degree bbc in a dragster with an old Littlefield K-8 blower so its very do able.

Never admit defeat, let them think you are defeated then come back in a tank....lol

Trevor Sherwood
727-364-4368

 

Car

Hey Bill, I just checked out the website but never made it past the chick of the week......That's website treachery, its like you can check in but you can't check out....I'm sure the car is nice also....lol

Just kidding buddy, but that fc should run good.
Trevor Sherwood

 

i have some friends with fuel heads on a 2700 lb maverick pro mod with screw.They have been low 3.90's !!!!!