Tune, Pulley, Long Tube Headers

[Blackdevil77]

Originally Posted by BPG

Not yet. This weekend will be my first run with this setup. Waiting on some drag radials...

Looking forward to your times! Do you happen to know how much boost you are running to make that kind of power?

[LuckyZL-1]

I eat Stingrays for lunch!! ZR-1's are a different story but when I run into one I promise I'll make it run hard!
I'm with Deke on having a C7-Z06 beside the ZL-1. I actually already wrote a check to my dealer here so got dibs one the first one in this area. As soon as specs came out I went overthere, they are gonna be badass!!!!

[DrkPhx]

Stock for stock the C7 will beat the ZL1 in performance. I was at the Detroit Auto Show and got a chance to the see the ZO6 and it's simply awesome. I also got to sit in the regular C7's (regular and comp seats) and the interior is light years better than the Camaro. My only complaint was it's somewhat cramped but maybe because I'm used to the more spacious Camaro interior.

[Blackdevil77]

Originally Posted by DrkPhx

Stock for stock the C7 will beat the ZL1 in performance. I was at the Detroit Auto Show and got a chance to the see the ZO6 and it's simply awesome. I also got to sit in the regular C7's (regular and comp seats) and the interior is light years better than the Camaro. My only complaint was it's somewhat cramped but maybe because I'm used to the more spacious Camaro interior.

Stock for stock, yeah the C7 edges out the ZL1 in just about every category, except back seat space lol. But it doesn't seem like you can go that far with simple bolt ons with the C7. The cam in it doesn't allow for much top end, and the stock fuel pump runs out of steam at around 650 rwhp with a blower. So with simple bolt-ons, like long tubes, intake and tune, the C7 will gain about 40 or so rwhp.

Basically, I know the C7 will out perform the ZL1 stock for stock.

I'm more interested in

C7 with long tubes, intake tune VS. ZL1 with headers, intake, pulley and tune.

Judging by the replies in this thread, it sounds like the ZL1 configured like this would outrun a C7 with long tubes, intake and tune.

[BPG]

Originally Posted by Blackdevil77

Looking forward to your times! Do you happen to know how much boost you are running to make that kind of power?

That's actually a good question, and one I should know. However, I don't. I've watched the gauge a few times and seem to remember it going beyond 12 or 13, but I'm usually at a pretty good speed by that point. I figure it's better to keep my eyes on the road

[Blackdevil77]

Originally Posted by BPG

That's actually a good question, and one I should know. However, I don't. I've watched the gauge a few times and seem to remember it going beyond 12 or 13, but I'm usually at a pretty good speed by that point. I figure it's better to keep my eyes on the road

Yes, with that kind of power, that would be a good idea lol

[hognutz]

Originally Posted by Blackdevil77

Oh, believe me… if there is some chance, somehow, someway I can afford the C7 Z06, I'd be going that route without thinking twice. It all depends on cost, and I'm 90% sure I won't be able to afford one, unfortunately. Low 60's is my absolute max right now, that car will be starting AT LEAST in the mid 70's, according to Tadge's statement.



That would be absolutely fine with me. Either way, the warranty would be toast, whether it be a C7 with bolt-ons, or the ZL1.

Factory boost is 9 psi, right? What would the boost go up to with, let's say the 2.55 upper pulley and 8.6 lower pulley? What amount of boost would be considered "safe?" I'm thinking maybe 14 lbs on stock internals at most???

weill I don't have both of those but I think about 17psi or so. many people are running that combo some are spinning even faster but I would not do it.

many people are running north of 14psi just fine but 14 would be very safe from what I have seen. that would save some coin as you can get there with 1 pulley.

there are three ways to pulley if you want big power in my mind staying in the safe blower RPM band.

1. 2.4 upper ~15psi
2. 10" lower I think ~15psi
3. 8.6 lower 2.55 upper ~17psi.

I don't have any of these yet so double check me this is just reading charts no real world. my car is 11.5-13.8 through the band right now.

headers and CAI will mess with the boost a tad too. Cai can add some but headers might drop it some.

[Blackdevil77]

Originally Posted by hognutz

weill I don't have both of those but I think about 17psi or so. many people are running that combo some are spinning even faster but I would not do it.

many people are running north of 14psi just fine but 14 would be very safe from what I have seen. that would save some coin as you can get there with 1 pulley.

there are three ways to pulley if you want big power in my mind staying in the safe blower RPM band.

1. 2.4 upper ~15psi
2. 10" lower I think ~15psi
3. 8.6 lower 2.55 upper ~17psi.

I don't have any of these yet so double check me this is just reading charts no real world. my car is 11.5-13.8 through the band right now.

headers and CAI will mess with the boost a tad too. Cai can add some but headers might drop it some.

What's the difference between doing an upper pulley and lower pulley? Is there an added benefit of doing one over the other? Would a smaller upper pulley cause any belt slip at all?

Also, is it safe to rev this engine to 6500 rpm or so with a pulley swap? I've seen dynographs go past the stock 6200 rpm redline once the car was tuned.

[mrvenicess]

Ive run a best time of 11.168 @ 123.24 mph. I have cai, LTs, 2.55 upper pulley and injectors. Have also done hx. My car is an auto and I run DRs. It should run in the high 10s if the air temp ever goes down here in FL!

[Blackdevil77]

Originally Posted by mrvenicess

Ive run a best time of 11.168 @ 123.24 mph. I have cai, LTs, 2.55 upper pulley and injectors. Have also done hx. My car is an auto and I run DRs. It should run in the high 10s if the air temp ever goes down here in FL!

That's a great time, I bet at Atco, that would of been a 10 second pass with an extra mph or two. What is your rev limiter set at? I don't think a C7 with Long Tubes, intake and tune will be running that fast.

[mrvenicess]

My trans is set to shift around 6100 rpm I believe and limiter is at 6500. Matt from FSP does all my work and is installing a Yank torque converter in a week or two. Should get me solidly into the 10s by then.

[Blackdevil77]

Originally Posted by mrvenicess

My trans is set to shift around 6100 rpm I believe and limiter is at 6500. Matt from FSP does all my work and is installing a Yank torque converter in a week or two. Should get me solidly into the 10s by then.

This might be a stupid question, but why not set the car to shift at 6500 rpm? Power doesn't drop off, looking at the dynographs that I've seen. Wouldn't it be beneficial to wind out the gears a little longer since it continues making power up top?

[wirebender]

Perhaps this chart from LPE will help.
This past Saturday I ran an 11.6 @ 124.6 on stock tires. probably ~13-14 lbs. boost. When I add lower pulley the supercharger will be just about maxed out.

[Blackdevil77]

Originally Posted by wirebender

Perhaps this chart from LPE will help.
This past Saturday I ran an 11.6 @ 124.6 on stock tires. probably ~13-14 lbs. boost. When I add lower pulley the supercharger will be just about maxed out.

Thanks for the chart, that DEFINITELY comes in handy! That's an awesome time and FANTASTIC trap speed! Manual or automatic?