Had the car dyno tuned at Carolina Auto Masters in Durham, NC today.

265.1 RWHP
373.4 RWTQ

Mods:
SDPC Vortec TPI Crate Motor (2 bolt main, LT4 Hot Cam, 1.6 roller rockers, Vortec 64cc heads, SDPC Vortec TPI Manifold)
SLP 1 ¾ “ headers and y-pipe (Fel-Pro gaskets, catalyst adapter)
24lb SVO fuel injectors
TB Coolant Bypass
MSD Superconductor 8.8mm wires
NGK-T55R spark plugs
Gutted Cat
K&N air filters
KYB AGX adjustable shocks/struts
Eibach Pro Kit Lowering Springs
Flowmaster American Thunder Catback
Accel Distributor Cap and Rotor
PST Polygraphite Front End Kit
Energy Suspension polyurethane transmission mount
180* T-stat
Hypertech Cool-Fan Switch
Gutted Airbox
EGR delete
AIR delete
Vigilante 2800 stall
B&M tranny cooler
Pro Built 700R4
Motive 3.73 gears
TA girdle and stud kit
Nitto drag radials

The horsepower was a little lower than I thought it would be, the torque was unreal.

Headin to the track tomorrow night to see if the Nittos, 3.73's, and the vigilante will make up for the horsepower I'm lacking.

I'll see if I can scan the dyno sheet and post it up here shortly.

What TPI runners you running? is your base and plenum ported out? What rpms you running at?

Looks like a real sweet street motor. That torque is UNREAL!! I would rather have horsepower closer to 300 whp so i am going with superram possibly or new BBK intake, pending on what it looks like. your setup looks pretty good.

The plenum, throttle body, and runners are all stock. It made the peak rwhp at 4600 rpm's.

I have my eye on the mini-ram or either the ramjet intake for the vortec heads. Jeff told me that I would see a gain somewhere close to 65 rwhp with any of the short-runner style intakes.

heck with fully siamesed SLP runners or AS&M large tubes, i bet you will see 25-30 rwhp, especially improvements over entire power curve.

With your car as is, thats impressive. Runners are holding you back. With that power and all that torque, assuming you maintain traction well, what do you think it will run in the 1/4? I am considering staying TPI with the SDPC vortec TPI motor like yours but with different cam. Just want to see some times. I bet that power feels great in the twisties with off corner torque accelerating you very quickly. LOL

That intake is choking the motor and cam. The hot cam makes great power at 5800 rpm and you are making peak at 4600. I would not doubt at least a 50hp increase with a min-ram. Here is an article were they used the mini-ram on some fast-burn heads.

http://www.carcraft.com/techarticles/56118/

Get rid of that gutted cat, that can't be helping performance any. Either replace it with a hi-flow model, replace it with a straight piece of pipe, or cut it open and weld a straight piece of pipe on the inside (if you have to pass a visual).

Running a gutted cat will actually hurt performance over having a functional hi-flow model.

I also agree to change the intake. Huge gains there on that motor.

As for a time? I'm going to say....mid 13's with 1.8x 60's

Wow, I am very surprised at the power levels with the stock TPI, very nice man. Put an intake on it and some tuning and shoot for 300rwhp

Nice, keep us posted. I'm looking at that same engine for my car.

You got a new chip in that computer right?

Great numbers so far esp with the stock intake setup, I have slp runner and everything ported on mine can't wait to see my numbers but unfortunitly its gona have to wait till next spring. Also was wondering what computer tuning you've done? Send me and PM

Ran it at the track tonight, here was the best run:

60': 1.966
1/8th E.T. : 8.647 @ 80.907mph
1/4 E.T. : 13.451 @ 102.555mph

To answer the question about computer tuning, I had been running a PCMforless tune when I first swapped in the motor back in July. The car ran pretty decent. I had the car dyno tuned (new chip burned) by Jeff Creech of Carolina Auto Masters.

As for the track tonight, it took me about 5 runs to launch it right. I kept stalling it and I would just spin my *** off. I had to just start partially stalling the car up to get any traction at all. I was running the Nitto NT555R drag radials at 25 psi.

I have a set of Spohn relocation brackets and boxed lower control arms waiting to go on. That should eliminate all of the wheel hop I kept having tonight.

I will post the slip up here tonight, along with a few video runs.

Again, sounds like to much on the bottom end of the power band. 13.45 overall is a good time. But I bet if you moved that power up in rpm range you could get a good 12 second run. You have the mph to do it. Keep the info coming. Good stuff!!

Ok here is a short clip. Sorry it makes no sense really, my roomate who was filming it was pretty drunk. hahaha

Short clip of runs, even though it shows one of my worst.

Dyno sheet:


Timeslip:

I think that's pretty damn impressive with the stock TPI topend choking it.

Was that a Dynojet or a Mustang Dyno?

It's a dynojet. Thier website is Carolina Auto Masters

Makes me wonder. I have an 89 GTA with vortec heads and SDPC base.

With stock cam, stock runners/plenum and TB I ran 13.3@103mph with 1.9160ft in ideal conditions. Normally it runs 13.5-13.7@101mph with 1.91-9360ft.

Considering you have LT4 HC, bigger headers, torque convertor and gears you should be faster. Wondering how much you'd gain from a set of large tube runners and a ported plenum.

I plan on installing a HC, SLP runners and a vigilante this winter and to be honest I would hope for some 12s once that is done.

Not ragging on you, just food for thought. My car also is fully loaded GTA weighing in at 3570 without me here is the rest of my setup:

stock L98 short block with 60000 miles
untouched "used" vortec heads
SDPC TPI base
GMPP 1.6 rrs
Stock L98 cam
Stock plenum (now ported)
Stock runners (now ported) gained about a tenth
Corvette torque convertor (1800)
boxed LCAs, Panhard and TQ Arm
LCA relocation brackets
Shift kit
stock rear with 3.23:1 gears
KYB GR2 in front and Gas-Adjust inback
DIY prom based on ARAP
Walbro fuel pump
now have SLP CAI
Edelbrock TES headers. No cat, 3" dynomax catback, 2002 Camaro SS takeoff muffler

ran consistently mid to high 13s at over 100 mph with low 1.9x 60ft.

Will install cam, SLP runners and TQ convertor this winter and see what happens

Shooting for 104-105 MPH and 12s

Yeah, the stock TPI is choking everything. If I had it port-matched, with a bigger throttle body, it would flow a heck of a lot better. Another thing was I was wheel hopping like crazy tonight. Every launch was horrible, even on my best runs. I'd spin, get off the line, then it would hesitate and spin again. I think if I had some BFG's and some more practice launching, I would be a lot better. I also have some play in my throttle cable that I need to take care of.

This was my first time at the track in almost a year, and my first time at the track with all of these new mods. Before I was running a 14.9 with 2.73's, catback, pulleys, k&N's, on street tires with a stock 305 TPI--and even then I'd only been to the track twice before that. I need to hearn how to launch and hook.

I think if I boxed the stock LCA's, put on the relocation brackets, dropped the pressure down in those nittos, and installed those ram air boxes behind my foglights, (and practiced launching), it would run a 13.3 or better.

What elevation is the track you're running at poncho?

a few hundred feet above...nothing special. I do have a lot of experiece at the track, and that plays a big role.

IMO your car can run 12s with some sorting out. It's all about maximising the combo and right now you are leaving alot on the table.

4sure traction will help, you should be in the low 1.8x with that torque convertor easy, if not even 1.7x. that would automatically knock 3-4 tenths from your ET. Then the intake and cold air boxes can be worth a few more tenths IMO.

If you can MPH around 105 then I can see your car running around 12.7-12.8 when it's all sorted out. You ever weigh your car?

Good luck

Nah, I've never weighed my car before. I did have a bunch of crap in the backseat that my friends made me take out. (bottle of coolant, 2 jackets, some tools, etc) but we didn't empty the car and take the spare out until the last run, which I spun too much on.

My first run of the night I had a 1.90 60' and ran 104mph, but I only ran a 13.7 because I wasn't sure where the quarter ended and let off too soon. I didn't realize it until I looked at the slip and ran 80mph in the 1/8th and ran 86mph in the 1/4. I was like wtf? lol

If anything, I feel the torque converter didn't help out too much last night, for the simple fact I couldn't get traction stalling it up any more than I could with my stock converter. I guess I need to work on getting that 60 foot lower, along with the BFG's.

The powerband of the Cam/Rockers and the Intake do not match each other. This is one of the cases where he could probably run faster with a smaller cam.

But damn, that setup sure gets up to speed in a hurry. 102mph is kinda slow for a 13.4. A 107 trap would probably be closer to right.

Nah, a well sorted combo running 107 MPH oughta be in the 12s, not low-mid 13s.

-Dave

From reading alot of papers and sites with different combos, a general rule of thumb to me seems to be 100mph should be in the 13.9 area.

Of course, the high torque nature of our engines throws that equation off some.

Fact of the matter is, his car is not well set up just yet. I can only imagine how all that mid range must feel.

That's what my car is shows...small cam(original L98) and runs 101+mph and mid 13s

Definitely not Anyone with a 107 trap should be well into the 12s or they are just not launching, in my opinion.

Those are good runs for your first time out. I think you can get into the 12's with that trap speed and some fine tuning.

As far as traction, buy some Hoosier Quick Time Pro's and call it a day. Mount them on a set of 15's and run 1.7 sixty foots or better. I have basically stock suspension and 2.73s and those tires gave me some really good short times.

With your 3.73s, heads/cam, your car is wanting to rev alot higher. I would assume deep 12's with a nice intake and some tuning. Good job

How do you think the Banks TT setup would do on this engine? Would the "Crate" specs hold up to about 6-8lbs?

Here is a short clip from the dyno day.

Click me

Here is a short clip I filmed outside of Carolina Auto Masters the day of the dyno--was trying to get a video of the car at idle to capture the sound.

Idle Clip

oh boy!!! im gonna let the cat out of the bag!!!


brian gruben is a good freind of mine.
the brian gruben who worked for nickey fowler at sdpc. his car was the red firebird that appeared in gm high tech. THE prototype car and engine for the vortec tpi intake.
now let me shed some light on the real hp figures his car made.......

the motor made 380hp+ on the dyno, flywheel of course. that was with the stock runners and tb.
sound different than what you read huh?

THIS IS THE BEST PART...
they added edelbrock runners and tb and it made 395hp!!!!!!

the most the car put down was 269hp to the wheels on our dyno(he worked with me for a short time at speedtek) and that was with an open y-pipe and with a cat. it also had edelbrock headers. it ran 8.5 1/8 mile and 13.56 1/4. now do be advised that was in lubbuck texas and they have a somewhat high elevation.
i very confident the car could do an easy 12.7. it had great power, just not great peak power.........

i always wondered why they did not publish the maximum horse power that they saw on the engine dyno, and brian never told me. maybe ill call him tomorrow......

i have to add brian is the most knowledgeable person i ever met and is an outstandingly honest and all around good guy. i just wish he had not moved back to lubbuck so we could have hung out more and beat on our third gens more

To possibly not have people go ape**** if their car doesnt make that kind of power.

Shoot,

I wonder what my car makes? I have the same combo- but with a 52mm holley tb, and azs&m runners. Also Turbo city burnt my chip. (PCM for less sucks wiennie) I should be arround 285rwhp maybe higher? The turbo city tune made a big diff. Car has pulled WRX's hard from a light(and continued pulling) also was neck and neck(and pulling ) a 03' M3 This is a cool street combo, If I ever have to pull the heads, everything (runners matched, heads) will get ported. in one race When I reved out 3rd, It hung with a 911 turbo(probably a 99'or 01') to about 115 ( really suprised the porche owner So what is left to max this thing out? I don't have pullies.

Yeah, I'm curious to see what this crate, in stock form, can do w/ normal bolt on's...hopefully somewhere close to 300rwhp...Granted, roughly 270rwhp isn't bad...but 100hp in drivetrain loss (from their stated 360hp at the crank) seems a bit high...

Wow I have basicly the same set-up as you man only real differance between our set-ups is the cam and headers used...I dunno if u have MSD but I have the 6AL box.

But as for number I have

243 rwhp/343rwtq (running extremely rich and chiop was barely tuned for the motor. I have a feeling at least 20 more horses are kickin around tuning issuses.

And at the track it ran almost spot on ur times

13.454 @100.35 i'll edit in my 1/8 mile time later but I think theres more to be had for u in the ET area. are u running on drag radials/slicks or street tires?

Jason

I was on Nitto drag radials, but I was wheel hopping during every launch, not to mention I wasn't able to use the stall to its full potential. I could only stall it to about the stock stall speed or a little higher.

I have some boxed LCA's and spohn LCA relocation brackets ready to go on, along with some ram-air boxes. I want to bolt on a set of ET streets and see what the stall will really do for me, too. On the christmas list is a loudmouth catback.

Then after that, its time for the mini-ram.

If I were putting on a miniram, i'd also swap out that hot cam for one that made power in a higher RPM range. The miniram and hot cam are a mismatch.

Just my I thought the mini ram shared almost the same characteristics as the LT1/LT4 intakes. So with that being said. How can the LT4 hot cam be mismatched with the mini ram? Both intakes pull in the upper rpm range and that's the whole reason behind GM calling it a LT4 hot cam, designing it for the LT1/LT4 (mini ram) users. Last I checked my intake loves high rpm's.

Hope I didn't step on anybodies toes!!!!!!! Just my

Didnt step on any ones toes. And heres my 2 cents.
The reason for the hot cam was to make a cam that was a step up from the stock one. That MR/LT1 intake has a lot more rev capability than that cam has to offer. That cam is alright, but not one that will continue to make more HP past 6000 rpm, and a MR flow past 6500 rpm, so why limit your intake?

cali92RS,

True, so very true. The mni is good for more rpm than that cam offer.

the hot cam was designed for the carbed lt4 crate motor. it was not designed for use with fuel injection. i have the mag from 1996 or so that had the lt4 crate and hot cam story. it was designed for off road use.

btw the intake it was designed for was about 14in long runners i think.

Strange I always thought the hot cam was a high reving piece. But, I have no interest going past 6000RPM. My guess that the hotcam together with the miniram on a vortec headed motor would take some of the crazy torque down below and make some really impressive numbers up top.. Would love to see it in person though...

Would the tpi ecm be able to control the miniram injector, tps, etc wise?

what kinda MPG are you getting?

bump

im wondering how much ur car weighs? cause i want to make a simular setup