John Scott

Again you'll hear both sides. I like the sound of the single, not as blubbery. A well designed three inch single can support well into the 400 whp from a V8 and is lighter than the dual. I'd bet you won't gain more than a few hp running the dual..if any. We have guys on this site running nearly identical stroker engine combos singl/ and dual with nil difference in 1/4 perf. But, I'm still scratching my head how Z-gad puts 600+ whp through his 3". BTW beautiful car!

I'm tempted to try this. Read this months Car Craft, November. Good bump in midrange power and torque. E85 metering blocks from Quick Fuel, adjust airbleeds.

Thanks for the replies, I have a couple of other sites voting for the 3%.

Anyone know? I can't remember or find my old tuning link. One Holley jet number= what percent change in fuel flow?

I can see it now. 'Nother kegger at sb's. Hmmm, that batch wasn't THAT bad either!

Silicone boy, Have you measured mpgs? I'm gussing with a 50% mix, precdicting a milage drop of 15-17 % over gasoline. Price-wise I bet its about a wash. I admire your willingness to experiment! AFRs to compare: Gasoline stoich 14.7 Gasoline Max power rich 12.5 Gasoline Max power lean 13.23 E85 stoich 9.765 E85 Max power rich 6.975 E85 Max power lean 8.4687 E100 stoich 9.0078 E100 Max power rich 6.429 E100 Max power lean 7.8 I was looking at converting, at least for the performance reasons, obviously the price will be no saving when figuring the milage loss. Nothing is going to replace our thirst for fossil fuels, but a dent here or there with some bio fuels won't hurt. I have questions about aluminum lines, need alcohol specifc carb, fuel pump and regulator, and probably fuel cell. What would happen to the inside of a 35 year old tank? Some excerpts from other sites discussing E85: "Fuel injector, carburator jet sizing and fuel pump requirments, can be estimated by using the following rules of thumb as a starting point. For a Naturally Aspirated (NA) engine (carburated) on gasoline most need a Brake Specific Fuel Consumption (BSFC) of 0.50 lbs of gasoline/hp/hour. On E85 the same NA engine would need a BSFC of about 0.65 lb/hp/hr. Turbocharged engines typically need BSFC fueling of about 0.60 lb/hp/hr, a reasonable first guess for fueling required on E85 would be 0.77 lb/hp/hr. For a simple conversion to replace gasoline with E85 take the current "flywheel hp" as a reference point. With E85, power should increase by about 5%, so the estimated E85 fueling would be: (BHPgasoline x 1.05) x BSFCe85 = Estimated E85 fuel requirements (Taken from another site) Pros: 1) The price per mile is much cheaper compared to c12/c16. If you lose a conservative 30% gas mileage, the price versus c12 is $8/gallon versus Denver's $2 a gallon or Springs' $3 a gallon, then you are getting a significant improvement in price per mile. I.E., 30% decrease in gas mileage, 75% decrease in price. If E85 can indeed handle the same power as c16, then you're looking at $2/$3 per gallon versus $16 a gallon. That's huge! I'm not sure of the power limit of E85 versus c12/c16 on a single setup, but I suspect it to be able to handle at least what c12 can (simply because even though its lower octane, its much cooler). I will test this on my car. 2) You will make more power with proper tuning. 8% has been proven 3) It will clean your engine compared to straight gasoline. It appears that e85, at worst, is not any worse than straight gasoline on the poloticial/environmental field. Regardless of the issue that it may not help global warming or dependency on oil in a big way, it helps us performance guys in a big way. At minimum, its an excellent, cost-effective alternative to race gas. ...and it appears that its not going away any time soon. "

I'm surprised Mike didn't jump on this one, but back to your down pipe, can you run a u joint, or a few in you steering shaft? It sure made my header choices easier.

Anyone heard of issues with alcohol and aluminum lines? Not methanol, but there's a lot of people experimenting with e85 around here, mostly FI'd turbo'd, with great results. Not like running the straight stuff, but 6-8% hp gains and way cheaper than 112 gas. If your only concern is milage and price, e85 mpg drops have been around 20-30%, so price doesn't offset that of running gasoline. Wish there could be a thread dedicated to this fuel, maybe alternate fuels(?) since it looks like it might be around for a while and benefit the performance minded enthusiast.

Nitto used to make a 555 225 50 16, but discontinued. Not good for anything with respectable power.

Might be easier to swap the 4/7 firing with custom cam. I've heard it might be worth a few hp and smooths out the pulsing. Easier than custom 180s anyway.

....and if you have a lump bumpy cam and then putt putt around for weeks you'll have perma black plugs like mine always look, even when I'm jetted lean. In other words, with old plugs, it would take a lot of WOT to get an accurate read. Better to start with a fresh set...or better yet what everyone else has already said about WB AFR. BTW, knowing your credentials, you could probably "Mcguyver" one of these in a few minutes from a game boy and a watch spring John

Looks NIICE! When are you going to take that bad boy to Bandimere?

I forgot to turn on my cooling fans the other day and was pegging the guage. Vapor lock is never an issue. Run a return style regulator, and if you have room, a phenolic, not aluminum, not plastic, carb spacer. Taking the time to run a good pump/regulator/lines allows you to work on all the other issues of keeping your Hybrid going. Vapor lock and fuel delivery won't be one of them.

Your temps sound brutal. The Griffin radiator is 19 x 24 x 3....Its going to be hard making side by side comparisons with all the engine variables, water pumps, power ratings, displacement, etc but if it works in your conditions it should about anywhere.

This old post is a blast from the past.Posted by 1fastz 9.76@ 149.6, I guess for some broken 1/2 shafts was just another day at the races: "anyone gone faster then me yet while still independant rear? -------------------------------------------------------------------------------- .......IM sure with the same motor and the large shot 8.60s is doable with the 400 shot. I tried makeing some 350 horse seting passes but after breaking 7 half shafts when I hit the bottle in second I gave up. It got old pushing the car back of the stageing lane from half way to the eight with a broken half shaft heh."

A Doc Hunt picture... with Only 5 horsepower?? ....Seriously, really cool shot.

Not a expert, just adding a link for good reading, especially when you get to stoich, fuel pump requirements,etc. http://en.wikipedia.org/wiki/E85

After seeing silicone boy's TT last weekend, I have a new appreciation for the effort and planning that goes into a project of this magnitude. Dropping the V8 in a Z is pretty straight forward, yet no walk in the park. To then add twin intercooled turbos??? Having it dialed in and running is yet another huge accomplishment. As I said in another post, I'm still in awe! Really nice silicone boy! I could see where a single would be the ticket, and really hope someone pulls it off, but the visual symmetry of the TT is sweet!

Thanks Silicone boy. Enjoyed the gathering and finally seeing the TT beast in person. I'm still in awe! The amount of work you've accomplished is amazing. You are so, SO close to terrorizing the streets, strips, tracks, car shows! BTW if you ever need another set of hands on any of your cool projects, just call.

Those are the old numbers. I heard the new were to flow like or better than the comp package. Huh?

I know quite a few are waiting, and waiting. I've heard flow #s really rock and have addressed the oil drain back problem of of the current style, Grrrr!

The sooner you realize not interact the better. Getting hurt or killed, or hurting or killing someone because you don't like the way they drive isn't worth it. Yeah, following too closely can get dangerous, but when you can just get over and let him pick another. Playing games with the brakes just adds fuel. I hate it too, but learned if you bite your lip a few seconds or minutes longer, you get over it without incident. I used to commute and let the testosterone and anger get the better of me. Even a few where I got the better of the situation, but no longer proud of my actions. Your "out of curiosity" exit says you didn't want to let it go. Amazing how many deaths just along our stretch of I25 highway are due to someone putting on the brakes because of tailgating, or thinking they can enforce an attitude adjustment. You did the right thing by calling cops. Around here its *csp.

A pretty sophisticated fuel leak, but yeah. After reading the ongoing gliches and bitches in the MS FI forum, I'll be carbureted for a while. I'm sure you've heard the preaching of single 4 bbl usually run stronger than mutiple carbs. Still, the sex appeal of retro dual quads is undeniable. Good luck on the issue.

Late (retarded) timing can cause this as well. I think just one tube would indicate lean fuel distribution.

Just over 20 on the last run. Probably mid 20s with a lighter foot.