Anyone out there have dyno results for a 416 L92 build with ETP 245's?

Interested because mine is going to be done in the next week or so.

 

not exactly what ur looking for but here is an idea
https://ls1tech.com/forums/dynamometer-results-comparisons/880685-afr-225-vs-l92-top-end-416-stroker-results-inside.html

 

He wants results of an L92 shortblock with ETP 245 (cathedral port) heads. That's a big runner for those cubes. You building an all out race car or a strreet strip car?

 

Numbers in sig with A4, 408, 12-bolt with Et 245`s. I know its not the block you want but it gives you numbers! Nitrous conv and tune for the spray!

 

I am pretty much looking at the same thing.

416 stroker with 245's, Kooks 7/8ths, 3" exhaust, ported fast, and a 150 shot for the strip.

Cam is going to be high 230's low 240's to retain DD capability.

Going through a lvl 5 FLT.

I am mentally preparing for 500rwhp, but I am hoping for more.

I can't figure out why 402's and 408's are making more power than the L92 416 builds.

 

That's way too much head for your goals IMO. Those heads are pricey too if memory serves. I would stick to a 225 head with the size cam that you are looking into. The Fast wont supply enough air to feed those heads.

 

I don't think having the 245's will hurt me, plus leaves room to go bigger on the cam later.

 

ET's are good heads, I think you wil get alittle more than 500 rwhp mark id say 520 or higher

 

400 tops

 

Yeah, at 3.5K...get back to work on my GOAT!



I'm just happy my wife hasn't divorced me yet, the GTO was supposed to be a small project.

My advice to anyone else is once you put that first mod on you might as well go all out right away and save the money in the long run from changing things to go bigger anyways.

 

BTW, anyone in Chicago (not that you didn't know already) should go check out Speed INC....great people who do great work.

I sent them my car from Germany while I was stationed there (now in Arizona) because of how great they have been to work with.

Larry does a great job at getting back to my emails that I send him everyday, and that I am sure he is sick of. So even if you are not in IL don't fret on sending them your car from out of state.


One last thing.....Speed INC are SUPERB at working with military. They ship via USPS and have been very flexible especially with the fact that they are tearing down my old motor and shipping parts of it off for another person who is buying it from me that is in Iraq right now...can't say enough about them.





















Hopefully that earned me an additional 1rwhp or so.

 

Ok, the car will make great power. However it really is overkill for a street car. I sold this very same car for something more streetable and lighter(corvette) as I put this setup in my GTO. A 225 runner or ETP 215cc runner would make for more of a killer street car.

Here was a little info about my setup:

The car made 540/475 SAE, 553/487 STD, 543/478 Uncorrected. I posted a graph of a comparison from my car on the same dyno 2 years ago bone stock.


Conditions at the dyno were as follows:
91.24 degrees 71% Humidity

Specs on the car/motor:
LME powered 408 that has approx 900 miles on it.
ET 245cc heads
11.94:1 comp
93 octane pump gas
Kooks 1 7/8" headers
SW 3" duals
FAST 90/90
256/260 .660/.643 114LSA cam
275 Nitto Drag radials
3.91 gears


Here is a vid at idle for ya:
http://media.putfile.com/04-GTO-w408ci-motor-idle-vid

Dyno Vid:
http://media.putfile.com/Dyno-pull-o...ci-Powered-GTO

 

Thanks doug, big difference in streetability though is that Larry and the crew at speed inc are going to put a streetable cam in for me in order to avoid (hopefully) the problem you ran into.

It would be great if it made that much power though!

I'm sure your 3.91's didn't help the streetability much with that large cam.

That is one monster motor though.

You built that in competition with Padre right?

 

Yeah, I beat him too it at the time. The cam size has only a little bit to do with it. I changed cams out to a 244/248 cam later down the road and picked up a little more tq under the curve and it still made 525whp, but the intake runner size has alot to do with the driveability.

Dougie

 

I agree with Doug, to much head for a Fast 90. That much head will needs a better flowing intake to be match up with.
A Beck sheet metal intake would work better with ET245 and make atlest 30 hp more if not closer to 50hp, but you might give a up a little TQ.

Bob

 

What was the problem with driveability when you went with the smaller cam?

 

250 255 640 640 113 in my 408 with A4, 12-bolt 3.73 gears and nitrous tune and conv. My ET 245`s pull pretty good. I have a SD tune and I drive around town with her all the time. Mike worked really hard with the tune. The fast intake is the limit, but I did put a beck on. Lost 45trq down low and pulled till 7800rpms. Car made more power, but I never drive in the higher rpms to us it. Plus your drivetrain needs to be able to handle the higher rpms. My A4 didn`t like it either. So I sold the beck and went back to a fast ported. Red light to red light its sweet! Might end up going to a Victor Jr intake in the future for the street! Here is a dyno of my motor when we first got it running. I make alittle more power now and trq is about the same! You can see where the fast shuts down.

https://ls1tech.com/forums/dynamometer-results-comparisons/662627-408-et-245-s-dyno-graph.html

 

Well if that is the case then the FAST really isn't my bottle neck for what I am trying to build (street/strip).

Thanks for the input.

 

I think what Doug is referring to, larger intake ports will have lower airflow velocity at low engine speed.

I'm not too concerned, the valve events and compression are spot on

 

This car untuned besides a base for the combo starts and drives around the shop great. The car sounds like a 224 cam in a 348 IMO. We plan to have the car wrapped up and tuned in approx 2-3 weeks.

Robby I'm sure we will see our goals