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Craig 930 RS's Avatar
 
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Question 930 manifold - maniflop - for CIS, SOMEONE please manufacture a better one!

Has anyone heard of a 930 manifold that replaces the flatty 930?

Not by increasing the manifold height (which would honk up most folks' CIS cars except those with EFI) , but with the goal of equalizing the runner lengths?
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 02-05-2009, 05:39 PM
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DonE's Avatar
 
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Forced induction works ok without the equal runner lengths. I really improved the performance of my motor when I extrude honed the intake manifold. Not only did it open the runners, but it also equalized the flow between each cylinder. Just a thought....
Old 02-05-2009, 06:57 PM
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Good question.

I am not sure I want to go the full SC intake when I get around to EFI. I kinda like the 965 intercooler.

I was thinking of honing and flow testing the stock unit.
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Old 02-05-2009, 07:31 PM
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I catch what Craig is saying- sombody needs to make a nice aluminum, low slung, longer runner, possibly some incorporated velocity stacks (not boxed) and make all cyls equal for CIS
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86' 930/GT-40R Sold
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Old 02-06-2009, 06:55 AM
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Quote:
Originally Posted by Ag02M5 View Post
Good question.

I am not sure I want to go the full SC intake when I get around to EFI.
SC intake? You meant Carrera right? I'm just making sure I didn't miss something.

Thanks,
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Old 02-06-2009, 07:22 AM
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hi guys,

I might be interested in this as a project. Would the intent be a 930 bolt-on intake manifold with improved attributes using CIS injectors?
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Old 02-06-2009, 08:16 AM
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why not just use a 3.2 plenum, with shortend CIS blocks and just re-locate the mass air meter so it fits with the plenum. It may take some creative plumbing with CIS lines and all, but would work.
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86' 930/GT-40R Sold
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2008 C6/Z51 Corvette
Old 02-06-2009, 08:22 AM
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Bolt on, retaining WUR mounting and exact height as OEM manifold -
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 02-06-2009, 08:22 AM
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Craig 930 RS's Avatar
 
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I want OEM fitment w/o screwing up the intercooler positioning - a freaking nightmare of BS I don't want to deal with.
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 02-06-2009, 08:28 AM
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Quote:
Originally Posted by Craig 930 RS View Post
I want OEM fitment w/o screwing up the intercooler positioning - a freaking nightmare of BS I don't want to deal with.
Beggars can't be choosers- the stock geometry sucks so bad that it is nearly impossible to make the performance that you want in the restrictions of the stock parts. Playing with some piping and moving the intercooler is not that bad, it just requires some fab work. In fact, I would be willing to bet that you could almost use your intercooler in its stock form with a flipped around 3.2 plenum. (throttle body pointing towards the back)
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Old 02-06-2009, 08:36 AM
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This is mine I worked on during my rebuild - to show what we have:




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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 02-06-2009, 08:37 AM
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The packaging issues would probably be the biggest challenge. I'm sure a nice improvement could definately be accomplished but if you keep adding requirements (like stock height) you will end up with the same result as what you have now! Also, if the price point is unreasonable (read> typical pelican'esk) the project won't even get off the ground. cheers.
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Last edited by Natchamp; 02-06-2009 at 08:50 AM..
Old 02-06-2009, 08:48 AM
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Quote:
Originally Posted by Natchamp View Post
Also, if the price point is unreasonable (read> typical pelican'esk) the project won't even get off the ground.
Extrude honing costs $6-700.00

Would $1000.00 be reasonable?
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Old 02-06-2009, 10:22 AM
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Quote:
Originally Posted by onboost View Post
SC intake? You meant Carrera right? I'm just making sure I didn't miss something.

Thanks,
Yeah I meant 3.2 Carrera. Sorry.
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Coming SOME DAY...1991 3.3 turbo, Tahoe Blue Metallic with some mods
Old 02-06-2009, 10:29 AM
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I think 1,000 could be reasonable. It's pretty hard to say at this point with no design. Like I said, if people thinks its a viable project I'd be willing to invest the time in development. But if people think that such is thing is going to be cheap they can remain in their dreamland Just take a look at some of the replies in "if you had a cnc machine....." thread and you get my drift.
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Old 02-06-2009, 10:33 AM
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Fast + cheap = not reliable
Cheap + reliable = not fast
Fast + reliable = not cheap!

Unfortunatly many of us (myself included) think we could get the world for these cars for not that much money because other car brands get it cheaper than us. Its just not the reality.
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Old 02-06-2009, 10:48 AM
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Quote:
Originally Posted by Natchamp View Post
I think 1,000 could be reasonable. It's pretty hard to say at this point with no design. Like I said, if people thinks its a viable project I'd be willing to invest the time in development. But if people think that such is thing is going to be cheap they can remain in their dreamland Just take a look at some of the replies in "if you had a cnc machine....." thread and you get my drift.
I thought about doing this as well. Not sure it would be a worth while adventure Though 1k sounds maybe a bit cheap for the time that would be involved
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Old 02-06-2009, 11:58 AM
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Contact Steve Weiner and briefly ask him what he thinks of the 930 manifold with regards to the flow testing he did......
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 02-06-2009, 12:07 PM
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A stock manifold, extrude honed and port matched, can easily flow enough air for 440 FWHP - the upper limits of CIS. And it works, fits and is engineered for the motor. Exactly what else are you looking for? The reason I went with EFI is that if I dumped any more money into new power making parts, the truth was I would still have a CIS car - cannot adjust fuel where it is needed or not needed, cannot adjust spark where it was and was not needed, and it has an antiquated, restricted intake circuit. Put a thousand here and a thousand there, before you know it, you've spent enough for a quality EFI conversion.
Old 02-06-2009, 01:57 PM
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Looking for more even air distribution, and that is all.
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 02-06-2009, 02:48 PM
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