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none intercooled boost

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    Default none intercooled boost

    Just looking for opinions on how much boost you can run on a non intercooled setup ether it be turbo blow throught draw through roots/screw/ centrifugal super charger efi or carb an on race gas or e85
    Let's say a SBC @8:8:1CR on a SRP piston. Built for boost @32* timing locked on a MDS btm box

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    gn7
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    Quote Originally Posted by neil450 View Post
    Just looking for opinions on how much boost you can run on a non intercooled setup ether it be turbo blow throught draw through roots/screw/ centrifugal super charger efi or carb an on race gas or e85
    Let's say a SBC @8:8:1CR on a SRP piston. Built for boost @32* timing locked on a MDS btm box
    Start by throwing out the BTM, its useless. Then consider throwing the SRPs on top of the BTM box in the same ash can. They are 4032 aluminum, and they don't handle heat all that well at the pressure you're considering. You better off with CP Bullet, or at least Icon if your budget can't handle it. Personally, I don't think budget and boost belong in the same sentence, specially in a boat. But there are plenty that will argue that point.

    BTW, "built for boost" and saying SRP 4032, AND 32 "locked" along with "BTM" are both oxymorons.



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    Last edited by gn7; 02-12-2014 at 06:08 PM.

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    Youre. not being nearly specific nuff. narrow it down to useage and what boost source youre considering. personally i wldnt drawthru anything other than roots or screw

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    Quote Originally Posted by IMPATIENT 1 View Post
    Youre. not being nearly specific nuff. narrow it down to useage and what boost source youre considering. personally i wldnt drawthru anything other than roots or screw
    Absolutley!!!



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    By draw through I ment roots/ screw reason I started this is I have been told blow through has a cooler charge then efi an you can push on it a little more now I am running a none intercooled SBC TT blow through @8:8:1 with SRP piston an btm box with the dial at 0 32* an with 40mm wastgate on each bank with 5lb springs is boosting 11psi with 22%slip on tourqe convert its STREET CAR so once I tighten up converter I'm afraid it my jump to around 16psi. Oh an sorry about the junk internals GN but it is a bowtie block with ARP head studs I bought one good part:

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    gn7
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    You currently running pump gas? Its a little higher than I would car to try on pump, but its possible with a BTM depending how much you are pulling out under boost. You say LOCKED, but that makes no sense with a BTM.
    If it is on pump, I can see the SRPs holding up. That wasn't your original question. SRPs are tougher than pump. They aren't tougher than C12/C16 or E85 if you decide to push the limits of the fuel.



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    I have not run pump gas sorry I left that out I have ran 112 sports mostly an VP 100 off the pump an have not used the btm or set the dial its been at 0 I thought I didn't need to pull timing out with good fuel on the dyno I could not control the boost I even took the springs out an it did 14psi at 6000 an it had not rolled over yet still had 800 more rpm I only wanted to run 8-10 psi max an really don't want to send it to Jesus its only got a few miles on it

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    Quote Originally Posted by neil450 View Post
    I have not run pump gas sorry I left that out I have ran 112 sports mostly an VP 100 off the pump an have not used the btm or set the dial its been at 0 I thought I didn't need to pull timing out with good fuel on the dyno I could not control the boost I even took the springs out an it did 14psi at 6000 an it had not rolled over yet still had 800 more rpm I only wanted to run 8-10 psi max an really don't want to send it to Jesus its only got a few miles on it
    So what is your question? 14 psi is nothing for 112 sports, or even 100 for that matter. The pistons are fine at that level, and even more so with 8-10. Why did I get the idea from you post that you are looking to lean on the thing.

    If you did set the BTM, the minimum is 1* per lb. That means 14* at 14lbs, which is pretty close to its 15* max. That's 17* at 14lbs with a 32 start. If you decide to go the other way, end up at 32* at 14lbs, and start the timing at 46*. And that's the MINIMUM retard! Like I said, they are next to useless.



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    I agree with gn7, let da bitch eat if youre putting good fuel to it.with that compression blowthru on turbos and at least 110 in the tank i wldnt be scared of 20lbs... a meth injection setup is cheap easy to plumb in and will give you alil peace of mind devils own dual nozzle kit, 1 on each turbo compressor outlet wld chill boost nicely and let you just leave timing locked at 28* or so.i dont like btm, we ran one on a big hp tt496 and it didnt like high boost too much.we eventually just locked timing and ran better fuel in that boat.im gna push 18-20lbs to my twin 70mm blowthru 5.3ls this spring but ive added a air to water intercooler along with the twins plus im meth injecting after intercooler to really chill boost prior to carb chilln it more on pumpgas 93. But im doin everthing i can for detonation control

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    I didn't mean to sound like I was going to be taxing it hard I have got so many opinions saying 11 psi is pushing your luck even with 112 none inter cooled so with 112 an if it goes up to 14-15 it will be OK ? Its 380ci an made 876 hp on 14 psi @6000 I don't know how much more it makes @6800 an I was leaning towards water/ meth

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    GN so what do you suggest for a ignition for this setup

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    Quote Originally Posted by neil450 View Post
    GN so what do you suggest for a ignition for this setup
    There is nothing wrong with the 6, its just the BTM part that is a waste of money. Like Impatient said, just lock it out, or get something that is programmable. At the boost you are taking about, I'd just lock it. Probably at 30 if you are planning on running 14LBs just to have some cushion. If you put it on E85, you can probably get away with the 32* at 14lbs with a blow thru.

    Didn't mean to sound like your setup couldn't handle what you are doing, the concern was where you wanted to go from here.
    20psi and those pistons with those pins is a invitation to be spending some money on some broken stuff.



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