If i were to put a blacktop head onto a silvertop block, would i gain any power from this, seeing that the throttle bodys are slighty bigger, and cams a little different. Im thinking of trading my old g/box for the head and doing the swap. what would i need.?
If i were to put a blacktop head onto a silvertop block, would i gain any power from this, seeing that the throttle bodys are slighty bigger, and cams a little different. Im thinking of trading my old g/box for the head and doing the swap. what would i need.?
if you're thinking of boosting soon, yes swap it. i hope you have a standalone or at least a piggyback system.
__________________ 1982 Toyota Starlet (SP61) boosted since 2007
they are practically are the same engine, the only reason the blacktop has more HP is b.c the internals are lighter. and for the TB go with the biggest just make sure you compensate the air to fuel ratio with a fuel management system.
they are practically are the same engine, the only reason the blacktop has more HP is b.c the internals are lighter. and for the TB go with the biggest just make sure you compensate the air to fuel ratio with a fuel management system.
the cams are a little more aggressive to...and the internals aren't just lighter it has higher comp. ratio
The Blacktop is more suited to naturally aspirated applications
while the Silvertop will be a bit better for forced induction due to sharing
some internals with the 4A-GZE.
i have the silver top in already, but ive got a trade i can make for the head. i know the cams are more agressive, and the ITB are slightly bigger, also the blk top supposed to have VVT-I, opposed to the ST's VVT but ill need the ecu to make it work.
Need to know this thou.........will a gbox from the 2E engine bolt up to a 20v?, they look the same, and im using the same axles from the 2E on the 20V gbox.
The trade is for a gbox that can work with a 4age, to get the blk top...any one?
well the c52 tranny from a the 3e and 5e g/box hooks up to the 4a bel housing. so i would imagen the 2e would do the same. and the black top and silver top are both VVT no i
oh ok, i read sumwhere its VVT-I, mis-information...
So your positive the 2E box will bolt up to a 4A huh...I thought it would since its very similar..
Ok well i guess ill get on the phone and make some arangements to get that head then.
Ill just swap the cams and TB's, should be a nice upgrade.
Get the blacktop head, its better. And yes it will bolt straight on, keep the silvertop cam belt and tensioner.
With the blacktop you get. Better intake cam, much nicer exhaust ports, stiffer valve springs, better intake/trumpets.
If your running AFM still (I could be bothered wading through all the crap in this thread) You'll need to make sure the airbox seals completly as they are a little different.
And for the last time blacktops are NOT VVT-i.
No A engine every had VVT-i.
Also, get a gearbox that came off a 4age, the diff ratio is so much better, any 4age fitted with an fe diff (I believe they are about 3.9 ) will suck in comparison.
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ok punter thanks for the info, i was just concernd about the extra air going in, cuz of the throttles and cams, thought i might need to put more fuel as well, with some kind of piggy back or fuel management.
I've read that putting a blacktop head on a silvertop block will lower the compression. And although its good for boost, it will make me lose power while N/A. Is this true?
Will the difference in the chamber lower the compression, and if so. will it make me lose power?
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