[Evolvedx27]

Originally Posted by Sinister Zl1

Im torn between the 18% and the 15%.

18% is gonna great too much heat

[Can'tHave2MuchHP]

Originally Posted by Evolvedx27

18% is gonna great too much heat

Not true at all. It will generate MORE heat, but it will not generate TOO much heat.

[Sooner Cole]

Originally Posted by Evolvedx27

18% is gonna great too much heat

The difference in the 15% and 18% lower pulley swap is not that great.

stock blower speed is 16,900 at 6500 RPM's
15% lower spins @ 19,435
18% lower spins @ 19,942

[Can'tHave2MuchHP]

Originally Posted by 17ZL1Camaro

The difference in the 15% and 18% lower pulley swap is not that great.

stock blower speed is 16,900 at 6500 RPM's
15% lower spins @ 19,435
18% lower spins @ 19,942

Exactly. Whatever 18% requires, so will the 15%. The LT4 is a hot motor already, and even though the ZL1 cools it better than the Z06, anything past stock blower RPM would probably warrant an upgraded heat exchanger OR an expansion tank with water/ice.

[Evolvedx27]

Originally Posted by Can'tHave2MuchHP

Exactly. Whatever 18% requires, so will the 15%. The LT4 is a hot motor already, and even though the ZL1 cools it better than the Z06, anything past stock blower RPM would probably warrant an upgraded heat exchanger OR an expansion tank with water/ice.

i was under the impression 18% created substantially more heat than 15%. just going off info from c7 zo6 forums.

[Evolvedx27]

Originally Posted by 17ZL1Camaro

The difference in the 15% and 18% lower pulley swap is not that great.

stock blower speed is 16,900 at 6500 RPM's
15% lower spins @ 19,435
18% lower spins @ 19,942

good info

[EDFHOBBIES]

I just read whipple site they clain 125 rwhp gains

https://whipplesuperchargers.com/ind...product_id=454

I thought with pulley no meth the Lt4 maxed out about 620 with Headers and CAI any research on IATs or how much power loss there is once the car is hot?

I know the Lt4 Zl1 w no mods pops out about 550 something hot with little power loss due to IATs.

I'm liking the Idea of the whipple for 125 RWHP if that is accurate and those are probably dynojet numbers so really about 100 on a mustang dyno?

[bmlocal175]

I want a M6 but of course want A10 numbers. How much more HP would you need to add to a M6 to consistently beat a A10 0-60 and 1/4 mile times? How much would it cost for that HP(installed) seeing how the A10 option is $1600?

[TheElementalCashew]

I took my newly 18% pullied ZL1 out for several hours of high speed, high RPM driving in the Twisted Sisters yesterday. Temps were in the upper 90s, direct sunlight, high humidity. Never saw the temps go above normal all day. I know it is only one instance, but the car never felt like it lost power or got heat soaked, so I'd call it a success.

[Blackdevil77]

Originally Posted by EDFHOBBIES

I just read whipple site they clain 125 rwhp gains

https://whipplesuperchargers.com/ind...product_id=454

I thought with pulley no meth the Lt4 maxed out about 620 with Headers and CAI any research on IATs or how much power loss there is once the car is hot?

I know the Lt4 Zl1 w no mods pops out about 550 something hot with little power loss due to IATs.

I'm liking the Idea of the whipple for 125 RWHP if that is accurate and those are probably dynojet numbers so really about 100 on a mustang dyno?

That would of been great but the test I saw on here showed less gains than that at boost levels far exceeding stock. Spinning the blower fast enough to produce 14-16 lbs of boost still wasn't even enough to get that blower into it's efficiency range.

[Maddawg]

Originally Posted by S.T.A.R.

Black, I'm right there with you, I'd like 650/650 at the wheels, just as the emblem on the dash implies!

what emblem??

[Blackdevil77]

Been searching youtube for ZL1 vids with bolt ons. Every video I have found is either of stock ZL1's, or cammed. Nothing in between. Seems like guys are either leaving them alone or going ballz to the wall.

[Evolvedx27]

Originally Posted by Blackdevil77

Been searching youtube for ZL1 vids with bolt ons. Every video I have found is either of stock ZL1's, or cammed. Nothing in between. Seems like guys are either leaving them alone or going ballz to the wall.

Hennessey has videos. Not sure how aggressive their tunes are but they at least mention mods too. It would be nice to make 663 hp and 695 tq on conservative tune.

[Can'tHave2MuchHP]

Originally Posted by EDFHOBBIES

I just read whipple site they clain 125 rwhp gains

https://whipplesuperchargers.com/ind...product_id=454

I thought with pulley no meth the Lt4 maxed out about 620 with Headers and CAI any research on IATs or how much power loss there is once the car is hot?

I know the Lt4 Zl1 w no mods pops out about 550 something hot with little power loss due to IATs.

I'm liking the Idea of the whipple for 125 RWHP if that is accurate and those are probably dynojet numbers so really about 100 on a mustang dyno?

LT4 maxes at 660-700 RWHP without Meth or E40. The fuel system can handle all the power the LT4 is capable of making on the stock blower. Aka, it can handle full bolt ons and ported blower (660+ on 93) and the only way to make more than that is by camming it which gives you more fuel anyway. Once you cam it, people are at about 750-800 wheel and can add a 200 shot and be at 1000 RWHP all on stock fuel system and cam lobe.