how much Boost at 10.5
how much Boost at 10.5 Hey guys, I just got a 416 short block from Scoggin Dickey. I have a set of Patriot heads with 72cc chambers that should put me at 10.5 compression. I am looking at a Procharger D1. Am I going to have detonation issues? How much boost can I safely run before needing meth? I am currently running a STS @ 11PSI on the stock bottom....have been for a year.
I am planning on using my current cam (224/224 581/581 114) I think that should be good for FI, and I already own it, but feel free to chime in. Basically, and everyone can attest to this....I hate taking my car apart (lazy). I want to put this together once and drive it. I also have the option of using 64cc heads and getting a larger cam. I think that would be in the 500RWHP N/A range. I am looking to make 650 RWHP with the Procharger.
I am planning on using my current cam (224/224 581/581 114) I think that should be good for FI, and I already own it, but feel free to chime in. Basically, and everyone can attest to this....I hate taking my car apart (lazy). I want to put this together once and drive it. I also have the option of using 64cc heads and getting a larger cam. I think that would be in the 500RWHP N/A range. I am looking to make 650 RWHP with the Procharger.
Why do you care about how much boost you can push? why not just worry about air flow, each blower or turbo is different. So if you worry about how much air you can flow you will have more acurate #'s.
There is going to be more airflow involved to push 10 PSI in a 416 than a 346 but isn't 10 PSI 10 PSI relative to the size of the engine, load, exhaust.....etc.? I am looking for a starting point... Also, how am I to measure this airflow? The CFM rating of the D1 with different pulleys? Which numbers will be more accurate? I realize if I have say stock manifolds I will have higher boost than headers, but that does not mean I will have more power. I care about how much boost I can push because I don't want to grenade my new motor
I dont want to seem rude, but, it seems evident to me that you need to do more research on your setup. Engines that you build, and plan to supercharge (whether it be a blower or turbo) Should be built in a certain fashion. Its a huge numbers game, not just this part + that part = good numbers. If you are really interested in getting the best numbers with the best longevity, you need to begin by choosing what fuel you will run all or most of the time. If you plan to drive it on the street regularly, i would go with 93. Start figuring out how much boost you want to run, then figure your head size to get the right compression ratio to reduce chance of detonation. This is highly simplified to the kinda math you should be doing, but its a basic start. I think you might want to order a book or two specifically on building forced induction motors.
I dont want to seem rude, but, it seems evident to me that you need to do more research on your setup. Engines that you build, and plan to supercharge (whether it be a blower or turbo) Should be built in a certain fashion. Its a huge numbers game, not just this part + that part = good numbers. If you are really interested in getting the best numbers with the best longevity, you need to begin by choosing what fuel you will run all or most of the time. If you plan to drive it on the street regularly, i would go with 93. Start figuring out how much boost you want to run, then figure your head size to get the right compression ratio to reduce chance of detonation. This is highly simplified to the kinda math you should be doing, but its a basic start. I think you might want to order a book or two specifically on building forced induction motors.
I will just take my crappy slapped together setup and throw 8 PSI at it and see what happens..... I have been throwing 11 PSI on my crappy used STS setup and my 100,000 mile stock lower end that I tuned myself on the street for a year now, it goes great and is still together. I don't have an unlimited budget, I work with what I have, all the research in the world won't buy me parts.
Hey guys, I just got a 416 short block from Scoggin Dickey. I have a set of Patriot heads with 72cc chambers that should put me at 10.5 compression. I am looking at a Procharger D1. Am I going to have detonation issues? How much boost can I safely run before needing meth? I am currently running a STS @ 11PSI on the stock bottom....have been for a year.
I am planning on using my current cam (224/224 581/581 114) I think that should be good for FI, and I already own it, but feel free to chime in. Basically, and everyone can attest to this....I hate taking my car apart (lazy). I want to put this together once and drive it. I also have the option of using 64cc heads and getting a larger cam. I think that would be in the 500RWHP N/A range. I am looking to make 650 RWHP with the Procharger.
I am planning on using my current cam (224/224 581/581 114) I think that should be good for FI, and I already own it, but feel free to chime in. Basically, and everyone can attest to this....I hate taking my car apart (lazy). I want to put this together once and drive it. I also have the option of using 64cc heads and getting a larger cam. I think that would be in the 500RWHP N/A range. I am looking to make 650 RWHP with the Procharger.
TECH Senior Member
Joined: Nov 2001
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You are going to have problems with that head unit size (D1SC) and the DCR with that cam choice and static comp.
At minimum I would change the cam to drop the DCR and run an F1A blower setup pullied for about ~10#s boost. With careful tuning it should live provided you have a boost ready piston in it. (see below)
With that motor I'm guessing you have a 4.1 stroke...How is the ringland setup on those pistons and pin placement? You might not be able to run any significant boost or spray on that motor.
Good luck,
Chris
At minimum I would change the cam to drop the DCR and run an F1A blower setup pullied for about ~10#s boost. With careful tuning it should live provided you have a boost ready piston in it. (see below)
With that motor I'm guessing you have a 4.1 stroke...How is the ringland setup on those pistons and pin placement? You might not be able to run any significant boost or spray on that motor.
Good luck,
Chris
