What cam are some of you guys running?

[NEARING]

High 8 to 9 sec cars?

duration and lift.

Just curious, not trying to steal anyone's combo.

 

[Otto J]

Not yet sure of ET with my combo but i am running a REED cam 540 lift with 226 duration at .050, Waiting for my new GTQ76 to get here, then to the track i go

 

[NEARING]

I assume that's a hydraulic roller?

Mine's 239@.050 with a tad over 600 lift. Solid roller.

 

[John Wilde]

I think it depends on the motor size.
Based on the size of Otto's Cam I would hope that his motor was a 23X. We have atually run a bigger cam on the stock block.
Nearing cam is a nice mild unit that would probably work well for a little street driving. We have run as big as 275 and .714 lift on a full stage two motor. The car made 1021HP with 600-1 HiFi.
Those turbos are junk with a set of 70s we would have 1500HP.
The car went 9.1 @ 150 with a lot left in the tune up and at about 3550lbs.

 

[NEARING]

Originally posted by John Wilde
We have run as big as 275 and .714 lift on a full stage two motor. The car made 1021HP with 600-1 HiFi.
Those turbos are junk with a set of 70s we would have 1500HP.
The car went 9.1 @ 150 with a lot left in the tune up and at about 3550lbs.

I wonder at what lift they really start to eat up the valve springs?

 

[John Wilde]

We ran the motor about 1 1/2 seasons and did not have a problem with the springs.

 

[Otto J]

It is a hydraulic roller, I leave the valve adjustment right at 0 ,THe cubic inch end up being 249on a 3.8bore 3.625 crank.I cant fiind a set of solid lifters to fit htis block correctly, so Bobby at RPE may take a set of hydrualic rollers and modify them to make them solid

 

[Big88]

Cam size

In my stage 2 i have 258 254 @ 050, 650 gross lift with 1.65 T&D roller rockers. It made 746 rear wheel hp with 575 R.W.Torque. It is 256 cu.in. pte 88 4bolt turbo. Go figure! {Solid roller}
Tom

 

[John Wilde]

Re: Cam size

Originally posted by Big88
In my stage 2 i have 258 254 @ 050, 650 gross lift with 1.65 T&D roller rockers. It made 746 rear wheel hp with 575 R.W.Torque. It is 256 cu.in. pte 88 4bolt turbo. Go figure! {Solid roller}
Tom

Tom,

Something seems very wrong with the numbers.
Who tunes the car???

 

[Big88]

Cams

Well mostly i do, [Timidly] As not to screw it up. In a 3400 lb. car it runs 9.20s @ 149+ 1.31- 1.35 60 ft. I know it should do better!

 

[NEARING]

Re: Cams

Originally posted by Big88
Well mostly i do, [Timidly] As not to screw it up. In a 3400 lb. car it runs 9.20s @ 149+ 1.31- 1.35 60 ft. I know it should do better!

What dyno (type was it)?

I used a couple of RWHP calculators and they show you to have around 100 more hp.

From the weight and MPH given.

 

[John Wilde]

Re: Cams

Originally posted by Big88
Well mostly i do, [Timidly] As not to screw it up. In a 3400 lb. car it runs 9.20s @ 149+ 1.31- 1.35 60 ft. I know it should do better!

Tim,

I am sorry if my comment sounded like an insult.
I really wish you could get someone to help you with the tune up.
My comment was based on Cal Hartline making 930RWHP with Champion Heads.

 

[HighPSI]

Based upon what my heads flowed, I chose a 224/234 grind. On the Stage2 headed cars I would recommend something larger.

John: Those hp numbers were on a Mustang Dyno. I have seen more with a dynojet.

 

[John Wilde]

Cal,

Please do not tease me, what were your numbers on the dyno jet???

 

[NEARING]

Probably 1000+

 

[HighPSI]

I'll have to dig out the old dyno sheets. I know I didn't hit 1000. I also didn't get the boost nearly as high. The Dynojet didn't put enough of a load on the engine, so the boost was 5-10 psi lower.