 4a inlet manifold vs 7a inlet manifold |
 Jan 19, 2007 - 12:07 PM
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Enthusiast  Joined Oct 27, '05 Currently Offline Reputation: 0 (0%)  |
It may sounds abit silly question but i was wondering, does anyone of you guys here did have a look into the differential of 4A and 7A inlet manifold design? I had some discussion with my fren today whom having 7A with 4A inlet head and inlet manifold, i asked him why not opt 7A inlet manifold which he said 4A inlet runner seems to be bigger hence he do think it flow better. what u guys think?
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Jan 23, 2007 - 10:24 PM
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 Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
basically, there is no amount of quality porting that can be done to an economy box engine to Really increase power. If you want more power, bull the stock pistons and rods and replace with performance versions, and boost the living hell out of it. If you already have a turbo, that's your option... assuming that you are currently running in the 6-8psi range with upgraded fuel pump and FMIC.
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Jan 23, 2007 - 10:58 PM
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Enthusiast Joined Oct 27, '05 Currently Offline Reputation: 0 (0%) |
QUOTE(FallenHero @ Jan 23, 2007 - 10:24 PM) [snapback]520628[/snapback] basically, there is no amount of quality porting that can be done to an economy box engine to Really increase power. If you want more power, bull the stock pistons and rods and replace with performance versions, and boost the living hell out of it. If you already have a turbo, that's your option... assuming that you are currently running in the 6-8psi range with upgraded fuel pump and FMIC. im boosting 1 bar now with S15 fuel pump. Using FMIC GSR intercooler. Piston do in consideration now but i just do not wan the head flow to be my bottleneck tats why im posting such question |
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Jan 23, 2007 - 11:20 PM
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 Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
QUOTE(normality78 @ Jan 24, 2007 - 3:58 AM) [snapback]520654[/snapback] im boosting 1 bar now with S15 fuel pump. Using FMIC GSR intercooler. Piston do in consideration now but i just do not wan the head flow to be my bottleneck tats why im posting such question Unfortunately the design of the head will limit top-end power based on your set-up. AND... you're boosting 1 bar? How the heck is that poor 7A holding up. I'd worry less about performance efficiency and more about the rods snapping like twigs. FYI, the FE head has proven to perform very well under boost but generally only under 7000 rpms or so. You can still make power above that... but flow inefficiency... or shall we say the inherit design will limit its ability to make top-end power comparable to GE counterparts... but the low-mid-range will be much stronger. If you want more information... post more about your set-up. -------------------- "It's ok to be naked girl... I'm an artist!"
1995 AT200 Celica ST: stocked out daily driver... 1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies... 1991 SW2x MR2 n/a: bare bones hardtop model soon to be... |
Posts in this topic
normality78 4a inlet manifold vs 7a inlet manifold Jan 19, 2007 - 12:07 PM
Kwanza26 no they don't interchange and no... the 4A man... Jan 20, 2007 - 3:39 AM normality78 oh, pardon for my mistake. i didnt make it clear. ... Jan 20, 2007 - 8:35 PM FallenHero not quite sure what you're asking... But the ... Jan 20, 2007 - 9:49 PM normality78 Alrite. Yeah, i guess what im asking wasnt clear e... Jan 20, 2007 - 10:15 PM soulshadow Give or take, I'd go with the 4AGE. The 7A loo... Jan 21, 2007 - 2:47 AM Kwanza26 I already answered your question. NO... there is ... Jan 22, 2007 - 2:47 AM
normality78 QUOTE(Kwanza26 @ Jan 22, 2007 - 2:47... Jan 22, 2007 - 3:07 AM FallenHero only thing you'll feel is a turbo.
Save your ... Jan 22, 2007 - 5:20 AM normality78 Im already on turbo Jan 22, 2007 - 8:59 AM Bitter that looks like he 7afe with TVIS, most DID NOT ha... Jan 22, 2007 - 11:06 AM normality78 yeah, mine was with TVIS but i've since remove... Jan 22, 2007 - 10:33 PM normality78 Well i've been boosting for 1 bar for about 8 ... Jan 24, 2007 - 3:26 AM dans_st I am planning to (still figuring out details), but... Apr 8, 2007 - 1:47 AM |
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