SLeeper94Z

This is a buddy of mines he says it has 400 horsepower,I have not seen the car all i know its tuned port, auto 350 turbo tranny , Can anyone tell me how he would get this car to push this much horsepower N/a ?
thanks

FruityOne

400rwhp out of a n/a TPI car? He's got to have LOTS of money into that intake to even think about it with a 400ci engine. I say its entirely possilbe to get 400hp at the crank, but the wheels are a bit harder.

This ignores the Superram, or First Injections setup.

Now, 450lb/ft out of a TPI car? That is entirely possible. TPI just doens't flow enough at the high end to make the kind of power numbers LT1/LS1 owners are used to seeing.

SLeeper94Z

Ok, what do they run stock, or with most the boltons

97WS6SCharged

A bolt on TPI is probably good for 250-260 RWHP with a ported stock manifold, and probably close to 360 rwtq. If the motor is assembled correctly (right heads/cam) and it has a tune, 400 flywheel hp isn't unrealistic, it would be about 325 at the tires, and depending on the displacement, over 400 lbft of torque at the wheels isn't a hard feat to produce. Makes for when you're going stop light to stop light. If you upgrade to a better intake, the motors usually loose some torque, but they can pick up an additional 30+ hp on the top end depending on the heads/cam.

Magazine times were usually low 15's/high 14's for a 305, mid/low 14's for a 350.

aklim

410 RWHP. See sig

FruityOne

Aklim, stick a TPI intake on that motor and I gaurentee you will lose about 50rwhp minimum. Maybe the magical 400rwhp is possible with a Super-ram, but a stock style TPI would be hard pressed to make more than 350rwhp.

I'm only expecting about 250 to 280rwhp out of my setup, though my ported heads are holding me back from making some real power.

With a ported aftermarket base, and some cleaned up AFR heads I could run mid 12's on motor. But it wouldn't be making 400rwhp I gaurentee that.

rat-at-tach

well lets put it this way the plymouth superbird which was breaking ALL of the track records in 1970 had a 426 hemi putting out 450horse,now unless this guys small block is a tricked out crate motor or hes running a supercharger theres no way hes gonna push that kind of power to the rear wheels.

97WS6SCharged

You do realize that technology has advanced quite a bit in the last 30 years, right? Making a small block chevy produce over 400 rwhp is pretty much a head/cam swap away these days.

FruityOne

TPI doens't make power. It makes torque. It might be possible with a First Injections setup, which is the original "TPI" intake. GM copied the Electromotive design, but when they did they reduced the plenum volume, and the runners went from 1.75" ID to 1.48"id.

The current First Injections setup has runners that can be ported to 2" ID with time and work. Combine that with a larger plenum and the stock FI base and it is possible to get 400rwhp with that design. But the FI setup isn't emissions legal in any state that tests.

The Super ram could make that kind of power.

Miniram, converted LT1 intake would make it easy.

On Thirdgen.org the most powerful n/a TPI setup I've seen was a 383 with quite a bit of work done to the intake and heads, aftermarket everything for the intake. And he only put down about 330rwhp, his torque was off the charts though.

rat-at-tach

You do realize that technology has advanced quite a bit in the last 30 years, right? Making a small block chevy produce over 400 rwhp is pretty much a head/cam swap away these days.


true to a point but its not as easy as swapping out the cam and adding heads everything should match from the cam to the carb,new cam and heads calls for new lifters,new rods,new rocker springs ,new guides,new intake and a new carb after all that your still only gonna push 340hp max asuming its a 350.

im sure you know that a stock 350 is putting out about 250hp unless its a crate then its well over 300bhp.
so like i stated earlyer UNLESS its a tricked out crate OR a supercharged motor
i cant see it pushing 400hp.

this is just my opinion and i am here to learn aswell!

Marc 85Z28

rat-at-tach - Completely forget EVERYTHING you know about old school muscle with 60s and 70s technology. 400rwhp can be done on a 350 SBC these days, with off the shelf parts, and without going too wild. A quick glance over at the LS1 crowd would yield stock displacment 346ci LS1's making 400 to the wheels with stock intake and stock unported heads. A cam and exhaust will get you there with a tune, naturally aspirated. Lookup member TRAXION... His 90 IROC was pushing right around 400 at the wheels on a mild 350 that even passed emissions. The car went mid 11s on 16" radial tires.

BTW - the overwhelming majority of big power cars here don't use carbs

rat-at-tach

yeah i do tend to forget most people dont run carbs on newer cars lol,i just find it so hard to belive that a 350 can push 400+ hp to the wheels without huge modifacations,hell that would be over 500+ hp at the block which is pretty much what the new vipers are pushing with there v10s!

Tony89GTA

TRAXION's combo that he used to get to mid 11's was not that mild.

Marc 85Z28

The car ran high 11's on the Comp custom grind cam, and passed MD's dyno emissions. The car ran mid 11's with the Joe Overton cam that wasn't that much more radical than the Comp custom. I've seen the car in person (new owner), and it's far from the most radical 350 I've ever seen.

Tony89GTA

Did the new owner have the car dynoed and emissions tested with his new mid 11's combo because I don't remember TRAXION posting any of those results.