Dyno Sheet: GPI SS1 VVT + GPI Ported Heads

[2010BlackCamaroSS]

For those interested, below are the numbers my car put out during the dyno tune at GPI after installing their SS1 VVT cam, ported heads, Vararam CAI, ported TB, and rod mod intake manifold.



The car is still on the stock converter and already had TSP 2" headers, TSP full 3" exhaust, and GM 3.91 gears.


You'll notice that GPI used STD correction instead of SAE. This probably inflated the numbers by 2% - 4%. I may reach out to them and see if they can render the graph using SAE correction. If so, I'll post the updated graph.

[ss camaro-monte]

This is really good data with all the dyno numbers we have been posting with our different combos but on same dyno. You and I have the same mods but I have a smaller cam. So you make about 15rwhp more and 10ft lbs more torque.

Another member just got his ss back from gpi with rod mod/ ported tb with ss1vvt but stock heads.He made 455 423

So ported heads are worth about 20rwhp. So that is worth more than a stage up on cam meaning I bet your setup makes a few more ponies then a ss2vvt with stock heads.

Point being I think heads are worth it if you have the money. Another thing is I think it shows how you can get a bigger cam like an ss3vvt and still only make 20-30hp more than you and maybe 40 or so more than me.

This in my mind shows me two things. While a big cam will make more power 30-40hp is not going to make a huge difference and driveability will suffer. Meaning if the ss1 vvt isn't enough power for you a ss3vvt won't be either. This is why I think keeping a cam mild and if you are still not satisfied you need to go forced induction.

The other thing it shows us is that any cam, even a smaller cam like mine makes a dramatic difference in these motors. You don't need a big cam to make good power in an l99. Just something better then our tiny factory cams.

Good numbers and I hope all came out well and it drives great.

[Falfan]

Man, I wish I had the cash to port my heads while they were off, just wasn't in the cards..., you're going to love your new cam, but if you're like like me you were already thinking about FI in the future...

[ss camaro-monte]

Well just realize that extra 20rwhp wouldn't probably be that noticeable. All three of our combos are mid 11s or better capable with the numbers we have if the car is set up correctly.

Invest that money in suspension, tire and stall converter.If you truly want a faster car for racing a stall is the absolute best mod along with tire and suspension. A 3200 stall dropped my car .3 alone in the 1/4. Imagine a 3600-4k. Probably worth .4-.6 especially with a larger cam that must have it to function properly.

I know GPI told me their ss1 with a 4k stall and drag setup ran something like a 11.3 but there have been a few get 11.6 or so with a ss1vvt stock heads, gears and stall with only drag radials.

[1JEWLDSSRS]

Originally Posted by ss camaro-monte

Well just realize that extra 20rwhp wouldn't probably be that noticeable. All three of our combos are mid 11s or better capable with the numbers we have if the car is set up correctly.

Invest that money in suspension, tire and stall converter.If you truly want a faster car for racing a stall is the absolute best mod along with tire and suspension. A 3200 stall dropped my car .3 alone in the 1/4. Imagine a 3600-4k. Probably worth .4-.6 especially with a larger cam that must have it to function properly.

I know GPI told me their ss1 with a 4k stall and drag setup ran something like a 11.3 but there have been a few get 11.6 or so with a ss1vvt stock heads, gears and stall with only drag radials.

Agreed here. My numbers in my sig are with stock heads, couldn't afford the extra bucks to port them at the time. You made some good numbers with the smaller cam. I haven't ran my Camaro yet on the track, but all I know is she is very quick when I can get it hooked up, and she pulls like a freight train! I was originally running a 3200 when we the build, but after 2 years on it just wasn't working like I wanted it to. Had some bog and lag in the mid RPM range, switched to a 4500 and boy what a difference it made in the launch of the car!! Night and day from the 3200. Plus the mid range came alive all the way out to 7200.. Like mentioned above, a bigger stall will get you anywhere from .3 to 06 in the 1/4.. Good luck and enjoy the new found performance.

[Moto-Mojo]

I hate to be a wet blanket here, but all that work would likely still get you spanked by a newer, stock Mustang GT. Maybe not. I guess I'm holding out for all or nothing. My car will be 8 years old this year. I can't see a mild mod making me happy. I'm tired of losing!

Enjoy.

[ss camaro-monte]

Someone will always be faster and yes a new mustang gt or lt1 runs 11.9-12.1 all day stock in an automatic. As for the stick cars I have beat several down the 1/4 before cam, head and gears because it is so much harder to get the same results as the auto cars.They can easily run low 11s with a few choice bolt ons but I can add a blower or nitrous and run 10s. Point is you get the car you want and mod how you choose.
My friends tesla stomps 95% of all cars that he races and it is just a dual motor model 3. Guess whose car he wants to drive all the time.lol
Oh fyi, my mechanic has a totally stock 2018 lt1 vette. My car slowly pulls away from him with the new mods. If he had my mods he would be in the 10s for sure but again something will always be faster than you.

[2010BlackCamaroSS]

Originally Posted by ss camaro-monte

This is really good data with all the dyno numbers we have been posting with our different combos but on same dyno. You and I have the same mods but I have a smaller cam. So you make about 15rwhp more and 10ft lbs more torque.

The data is good if GPI was using the same correction method on all of our dyno sheets. Was yours using STD correction as well?

Originally Posted by ss camaro-monte

This in my mind shows me two things. While a big cam will make more power 30-40hp is not going to make a huge difference and driveability will suffer. Meaning if the ss1 vvt isn't enough power for you a ss3vvt won't be either. This is why I think keeping a cam mild and if you are still not satisfied you need to go forced induction.

Agreed. My goal has been forced induction all along and I wanted to maintain stock-like drivability. I upgraded other items on the car to prepare for FI when I did the cam swap, such as ARP head studs.

Originally Posted by ss camaro-monte

Good numbers and I hope all came out well and it drives great.

Thank you. So far, so good.

[2010BlackCamaroSS]

Originally Posted by Falfan

Man, I wish I had the cash to port my heads while they were off, just wasn't in the cards..., you're going to love your new cam, but if you're like like me you were already thinking about FI in the future...

Indeed I am. I want the car to scare me when I press the gas pedal!

[2010BlackCamaroSS]

Originally Posted by Moto-Mojo

I hate to be a wet blanket here, but all that work would likely still get you spanked by a newer, stock Mustang GT. Maybe not. I guess I'm holding out for all or nothing. My car will be 8 years old this year. I can't see a mild mod making me happy. I'm tired of losing!

Enjoy.

I beg to differ. I was running with and beating newer stock Mustangs, before the cam, with only headers, 3.91 gears, drag radials, and a GPI street tune. I'm not saying I always beat them, but I had my share of wins.

Wait 'til they get a load of me now!


Also, I don't consider this a mild mod. I picked up over 100 WHP.

[2010BlackCamaroSS]

Originally Posted by 1JEWLDSSRS

Good luck and enjoy the new found performance.

Thank you!

[2010BlackCamaroSS]

Originally Posted by ss camaro-monte

Someone will always be faster

Indeed. Mod until you're happy.

[ss camaro-monte]

Only thing magical about new camaros and mustangs is the 10 speed auto they share.lol
It is one bad transmission!

[2010BlackCamaroSS]

Update:

Got a response from GPI. They only work in STD correction, but they did provide my numbers using SAE correction (453WHP/424WTQ). Observed/uncorrected numbers were 457WHP/428WTQ.



They also stated I now hold the record for the most HP they have seen on their dyno with a naturally aspirated SS1 cam. The previous record was 467 (STD correction).


I know the numbers don't really mean much; so we'll see what it will do at the track. I realize the stock converter will slow me down, but I'm hoping to be in the 11s. I'll post time slips when I get them.