Depends on which exact heads and cams. If they're good blower cams and the heads flow good, I'd say 10-11psi would put you between 500-550whp.

 

trick flow heads cms stage 2 blower cams and im looking at putting a vortech on it.

 

I would say close to 15pi to get you there.. What fuel are you gonna be running..93-race,E85?

 

^+1 I say throw 15/16psi at it

 

guessing 13/14

 

With heads and cams I'm gonna say 13-14 or a little less.

 

what size blower?

 

What fuel? Meth/water injection or not? Intercooled or not? What heads, cams, and intake are you running? You need to give us more details, OP.

 

Ill be doing 93 gas intercooled system no meth. I'm doing a vortech v1. Tf heads 38 cc chamber edlebrok (however its spelled haha) manifold 70 mm tb and rpm plenum. You guys think I'd be safe with 14 psi intercooled on that c.r.?

---------- Post added at 02:45 PM ---------- Previous post was at 02:44 PM ----------

I was thinking maybe 12-13 psi would put me right about 500

 

I think with the TF heads and CAM you'll only need to have 11-12 psi. A 3.33 pulley on the Vortech should get you there.

 

Depends on which exact heads and cams. If they're good blower cams and the heads flow good, I'd say 10-11psi would put you between 500-550whp.

I would say close to 15pi to get you there.. What fuel are you gonna be running..93-race,E85?

^+1 I say throw 15/16psi at it

I

I think with the TF heads and CAM you'll only need to have 11-12 psi. A 3.33 pulley on the Vortech should get you there.

With stock heads including valve springs which limited my rpm to 6200, stock intake, Houston Performance S292 cams, and a Cheap Professional Products TB/PLENUM I made 515 @ 11.5psi. That was with 18cc dished pistons about 9.2:1 cf ratio.

Then went with Patriot stage 2 heads and @ 16.5 psi made made 598.5 hp. Since the heads were ported with the swirls dams removed we estimate the cf ratio to be closer to nine flat. This was all with the little v1 s-trim on 93 octane and 15* of total timing.

 

You will need around 11psi to see 500rwhp. Im making 498rwhp at 10psi on a bigger blower.

 

The reason I'm going v1 is because I love the roar air sucking sound it makes and is a decent blower. My goal is 500hp safely. I blew my old set up that was n/a so I went for forged pistons and rods and stock crank. The lowest I could get my cr was like 9.2 cause the 38cc heads.

 

I'm running 9.5 compression with TFS heads and stage 2 cams. Planning on running a t trim so I'll let you know when the build is done to give you a better idea. However it'll still be a month or so with school :/


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is it safe to run 15-16 with 9:2 cr?

whats so much better about prochargers flow rate?

---------- Post added at 09:05 PM ---------- Previous post was at 09:04 PM ----------



what is your rwhp?

 

I'd go V-2 or Procharger D1SC

 

Im running about 17-18 PSI making 604RWHP with 9:5 compression. Automatic

 

Well from my 13 years experience procharger overrated their entry level SC's I have seen a 4.6l 2v break 600 with just a V1 S-Trim on pump gas low compression and low total timing. The P1SC is not near as capable as any S-trim the V1 or V2. The main reason a V2 is ever so slightly more efficient than the V1 is the how steep the steep ratio is. The make very similar numbers when spun to the same impeller speed.

The D1SC is more comparable to the S-Trim than the P1SC. Also Vortech are cheaper to upgrade later and the same bracket the holds the entry level S-Trim will hold Vortechs largest SC the YSI which supports over 1000 hp. Try putting a Procharger F1 on a P1SC bracket.
S when I get a YSI all I have to do is unbolt the old one and install the YSI.

 

im still think vortech v1 cause it just seems easier and the results will be damn near the same

 

When I rebuild my bottom end I'm going to raise the CR to around 10-10.5 and keep the boost about the same. I've read that raising the CR will give more bottom end with better throttle response. I've always put driveability above HP or track times.

 

Ill be keeping an eye out for your build, If you run E-85 OR Race fuel all the time on higher boost levels you will be ok. If you decided to run pump gas and high boost youll be rebuilding a motor.

 

Aren't you scared of blowing the motor with a 10.5 cr? And boost.

 

Nothing wrong with some compression.