I haven't seen a thread like this around here at all. I know somewhere there are people that have pushed the TPI and gotton some big numbers out of them...


I'm looking for only LTR type setups. No minirams, HSR, or Super-ram setups.

Post up your engine and TPI information!

I'll start

Engine
315ci TPI
Edelbrock heads
HR cam
Hooker LT headesr w/ true duals
8.5/1 compression
Vortech V7 YSi supercharger at 15 lbs(intercooled)

Intake
SLP runners
ported plenum(siamesed)
stock ported base
58mm TB


658 at 15psi at 4800 RPM


I bought the caras stated above... I can NOT verify those numbers 100% although I do have a dyno sheet from the car showing 598rwhp. National Speed verified the car came back and made near 700, so I believe it's legit. I just never verfied it, so I dont wanna state 100% that is what it made.
The car had two blown head gaskets and almost a hole in a piston when I bought it. It's currently down for an AFR headed 355, bigger cam, more port work on the intake, and a megasquirt system replacing the factory ECM, FMU, and FIC.

Post up what you have and encourage me to hit 800rwhp on the small pulley when it's back together!

 

you lil show off hahah. those are some impresive numbers for a ltr set up. Are You running a bored out 305?

 

I'm not showing off, I just want to see what others have done to get big TPI numbers. I have been around here a long time but everyone seems to ditch the LTR setup and go with something else.

It was a bored out 305, yes. I am in the process of replacing it with a 355....

 

lol i was jk bout showing off hell if i had that you guys wouldnt hear the end of it. i hope i will have dyno times in jan sometime. i have a ltr set up as well

 

Come on! There are no TPI cars putting out big power? Why are there so few supercharged thirdgens as well? Searched the board several times with few results coming up

 

In my case, Im pretty much broke. im almost done with school. Studying to be a Computer Technition. Then I wanna open up my own shop. Its a dream for now though. Other than that, Im broke. Sux.

 

NufNuffZ28, I read all the info about the buildup on that car. One of the nicest camaro's I've ever seen. Do you mind if I ask how much you got it for? Also, I thought the megasquirt was only good to about 500hp max. Is that wrong?

 

Is that 658 HP at the wheels?

Either way, that is very impressive!

 

'88 305 roller block bored .20 over
crane powermax cam
s/r torquer 305 heads
headers / 3" cat back

procharger d1sc 14# 3 core intercooler
snow stage ii methanol injection
code59 tune

stock ported 91 TPI plenum
accel ported lower base
accel ported runners
holley 52mm throttle body

380/420 to the wheels

 

Waiting to see that one

holy..
Damn Im impressed.

Post your results and combo over at CF C4 tech doubt they have heard of something like that before...outof a 305, way to go man.

 

No problem and thanks man.


https://www.thirdgen.org/forums/cama...maro-iroc.html

How much I paid is in there. Decent deal, but have MUCH more in it now


Megasquirt will handle much more than 500hp...

 

Reread the first post after my edit. I would, but since I didnt 100% verify it with my own eyes I don't feel right doing it(I can say before I pulled it down, it felt really strong) I bought the car with that setup in it, but I couldb't verify it as it had two blown head gaskets

I'm glad you posted up! This is the exact kind of thing I'm looking. Do you have any pictures of a build thread? I'm interested to see and read more about it

 

You must have seen this:

http://www.theturboforums.com/smf/in...?topic=61219.0


(edit) For those of you who dont want to go blind reading all this, the old used up motor was pulled out intact and running perfectly after going 9.37@150! Best power number was 738 whp @ 25 psi and a 75 shot of NOS. Ring gap ended being .090 on the top ring when i finally pulled a piston out of the hole.

 

I tried to follow that and got dizzy!

Can you give me a basic setup and pictures? I would also be interested in a dyno graph. Guess it shows a TPI can run if you make it!

 

I've got a good baseline for you guys. A single turbo 5.7 TPI that is completely stock, 145k miles. It's pretty well worn too, as the #7 plug was completely oil fouled when I pulled it out this past week. Engine is stock, support mods are Walbro 255 in tank, 65# injectors, MSD-6AL, Megasquirt and a built trans/good converter.

Best dyno numbers to date 299 rwhp / 387 rwtq at 10.5 psi. I'm running 12.5 now. The torque peak is false because the peak torque occurs at a lower RPM than we have been able to effectively capture on the dyno. Now that I have built the 700r4 to have higher line pressure at part throttle, we are going to lock the TV cable to about 70% and start a wide open throttle pull around 2500 rpm. I expect to see around 330 rwhp/420 rwtq.

Either way, the numbers I have so far put that crank at 350 hp / 450 tq

New engine combo coming this winter.. Forged 355, AFR 195, mild cam and a bigger turbo. Plan to run 16-20 psi when all is said and done. Expecting 450 rwhp and 600+ rwtq.

 

I bet you will make more than that!

I made more than that on a mild 355 AFR head combo with a 150 shot...

PLus, I have a similar setup and want much more than that...

 

There was a car craft article on the car a few yrs back,

Link:
http://www.carcraft.com/featuredvehi...ird/index.html

Pics:






Basic set-up was a tired *** 2 bolt main 350 with cast everything, smogger heads, 224 Summit cam, twin TE-44's at 25 psi, a/a intercooler.

9.37@150! Best power number was 738 whp @ 25 psi and a 75 shot of NOS

Dyno sheet:




Anything else you can think of will be in the other thread....but it is almost 160 pages long.

 

Wow, nice FLAT HP and Torque..... Last question.... What RPM was max made at, so I can get a relationship on that dyno graph. I am looking 700 plus rwhp with mine...

 

I'm building a 350 ci. Forged internal procharged setup. AFR 190 vortec heads, slp ported runners, ported plenum, 52mm tb, d1sc, fmic, stock emu gonna use moates to tune it. Etc etc

 

OK, This just goes to show. That when using boost. a switch from TPI's LTR setup to a shorter ram style like HSR or MR. Is not needed for BIG HP.

 

Youre correct there!

What kinda numbers are you pushing? I see you're on a LTR setup

 

Wish i knew. Never had it on a dyno, or at a track. Thinking Trickflow 305 heads, TPIS lower and TPIS 52mm TB next. Not sure though.

 

658 at 4800 from a 312 on only 15psi sounds way optimistic... I'd verify that on another dyno or better yet at the racetrack. I make around that much on 401 cubic inches with twin turbos at around 5500rpm (mustang dyno tho)... Doesnt add up to me but if it does, thats incredible. That would imply something around 330whp on motor alone which is unheard of for a TPI 305 based build.

 

I bought the caras stated above... I can NOT verify those numbers 100% although I do have a dyno sheet from the car showing 598rwhp. National Speed verified the car came back and made near 700, so I believe it's legit. I just never verfied it, so I dont wanna state 100% that is what it made.
The car had two blown head gaskets and almost a hole in a piston when I bought it. It's currently down for an AFR headed 355, bigger cam, more port work on the intake, and a megasquirt system replacing the factory ECM, FMU, and FIC.


search zdaddy on here and you will see his dyno thread. I do have the 598 graph I'll scan in soon...

 

I knew i seen those numbers before. its a pretty built 305 even tho the heads are nothing special. Peak was 598whp at 5800 rpm on 16 psi thru a T5 transmission, and that may be on E85 fuel as he was talking about tuning that setup on E85.

Those are still very good numbers for a 305 based motor.

 

"NufNuffZ28" Ive also seen a video of youre car up here from when ZDADDY owned it. I think it was a low 11sec pass. And he was baby"ing it.

There has to be more blown TPI cars around to get some more power #'s. Were are you guys???

 

I'd love to see that video if you could find it!

And, yes. There has to be more SCed and turbo cars. I can't believe everyone is THAT fast to ditch the TPI!

 

I want to see what the highest LTR setup is.

 

COME ON! There has to be other people out there pushing the limits of their TPI's....

 

It was mentioned here before but the guy with the junkyard 350 L98 TPi motor went 9.3 or 9.4's with a turbo setup + nitrous. Thats 730whp or whatever it was. Very stout build using TPI. TPI can get it done on boost, theres no question there...its just easier to work on single planes and HSR/Miniram type setups

 

I have a hard time believing that car craft 150k mile short block story. I've heard many times that a seasoned motor run through lots of heat cycles tends to be better but thats just ludicrous.

 

TTT, because there has to be more high HP cars out there rocking the LTR's!

 

You stole it at that price. The Autoart wheel and tire setup on that car is almost worth half of that. How are they hooked up and with what adapters?

 

I'm hoping to join this group in a year or so when I finally install my turbo on my stock small cam lb9. I'm aming for about 320whp and 420lbtq at 15psi.

 

They are custom backspaced with no adapters. I LOVE THEM

 

Currently am building a 350 TPI for my car at the moment. Not anywhere near finished but below are my build specs.

350 Vortec block
AFR 180's
Flat Top Pistons @ 10.2:1 Compression
LT4 Hot Cam
1.6 ratio rockers
Ported and Siamesed Plenum - Ported to 1.8 inch and Siamesed to 1.5 inch, TB ports opened to 58mm
Holley 58mm throttle body
Ported Accel Runners Ported to 1.8 inch, Siamesed 1.5 inch high and 2 inch deep
TPiS Big Mouth Base, port matched.
7730 computer from a 1991 Camaro w/ custom tuned AUJP Prom
26lb injectors
Walbro 255lph Fuel Pump

I'd also like to get the entire intake system extrude honed but maybe down the road somewhere. Get's a little pricey.

I believe that just about does it. I'd be happy with 400 at the crank and will probably easily twist out 500ft/lbs, the great thing about this setup is that it's going to be a torque monster! It'll fall on its face at around 5000 revs (hopefully the port job will help it get to 6000) but it's a street car and show stopper so that is ok for me.

Come next spring, hopefully I'll know exactly what it is throwin down!

 

I'm not sure your get 400 at the crank maybe/hopefully, thats about the same exact same set up I have If you check my build and i dont think that ill be at 400 im thinking 380ish ? Your using the hot cam and im using the xfi 268 from comp cams and 30lb injectors?

 

Yeah, it's not built yet. I'd be happy to get 400 but I'm not expecting any more than that.

What pistons are you using? I was told by the guys at summit racing that flat tops with +7cc valve reliefs produces 10.2:1 with the eliminators but when I calculate it out I'm only at 9.6:1.

But we'll see if I can get 400 out of it, it would be nice but definitely not required, i won't be racing the car or anything, it's more about being loud and looking good.

 

I have rwhp numbers not flywheel but I am putting my flywheel number between 340 and 350, closer to 340. Your engine will have a better base manifold, and a little more compression than mine (I'm at 9.0 to 1). I don't think you will gain much with the 58 mm with the other stuff you are using. The 180 AFR's are Great heads but 400 may be a little on the high side. Go with a stock throttle body or a 52mm and you will probably be happier. I think the 58 may make your low end soggy.

 

Yeah, i do have a 58mm for it at the moment but I can anways switch out to a 52 if I want to later but I figured I'd start there and work it back if I want to or have to. But yeah, 400 is pretty optimistic, we will see.

If it makes it there, would be pretty amazing though!

 

If you ever want to sell them...

 

I've had a few PMs about them already since they aren't on the car at the moment and peeople are hoping I'm selling them.


TTT because I have my car on the dyno and have some base numbers now! Like I said earlier, I do THINK the numbers of the car I bought were optimistic for sure or a VERY happy dyno.

I am still tuning, so I'll update this thread when we are done!

 

im aiming for over 400hp on
full msd, cai, 1.7 rockers, afpr, side skirt exhaust, water injection, removed restrictors and emmitions, 75-125 shot of nitrous

 

586 Horsepower and 608 ft/lbs on a bored and stroked 335 She's a total sleeper that eats exotics I can drop the pulley size down and spin up more boost from the Vortech Supercharger but it's a bit "hairy" at that point.