broken_scars
New Member
i have a 92 integra gs b18a1 and want to swap the head to the b20..i have never done this and was wondering what all i need. also for the same amount i would spend on a b20 is there a better head to get? thanks
help with b20 head swap please
- Thread starter broken_scars
- Start date
mirrorimg
Well-Known Member
Edit... I just reread what youre doing/what I posted. There is no need to replace the head with the exact same head unless you find a P8R b20 head. The only difference between 90-93 and 94+ LS heads are the camshafts.
If you really want to upgrade the head, get some aftermarket LS camshafts and new springs/retainers to match them. Some camshafts arent too aggressive and you can stay with your OEM springs/retainers.
If you can, you want to get the B20 P8R head. It has the best flow characteristics of all LS heads.
Its really as simple as taking the current head off, putting on a new headgasket, installing new ARP headbolts (you need to replace the current bolts as they are torque to yield and not reusable), put the new head on, and torque in proper sequence.
If you really want to upgrade the head, get some aftermarket LS camshafts and new springs/retainers to match them. Some camshafts arent too aggressive and you can stay with your OEM springs/retainers.
If you can, you want to get the B20 P8R head. It has the best flow characteristics of all LS heads.
Its really as simple as taking the current head off, putting on a new headgasket, installing new ARP headbolts (you need to replace the current bolts as they are torque to yield and not reusable), put the new head on, and torque in proper sequence.
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BigMac88
Fat guy in a little 'teg
The B20 is a direct drop-in to your car as long as you go with an OBD1 engine. You will need a chipped ECU w/ B20 basemap in order to have the car run properly. If you use a stock LS ecu it will lean out. There may be small discrepancies in the harness wiring on the DA's but I'm not positive.
Head-wise you could also go B20/VTEC. Although, those are very tempermental motors and they must be built very specifically in order to run properly.
Head-wise you could also go B20/VTEC. Although, those are very tempermental motors and they must be built very specifically in order to run properly.
tilegend
New Member
why? B20 heads are P75 casting = B18BThe B20 is a direct drop-in to your car as long as you go with an OBD1 engine. You will need a chipped ECU w/ B20 basemap in order to have the car run properly. If you use a stock LS ecu it will lean out. There may be small discrepancies in the harness wiring on the DA's but I'm not positive.
Head-wise you could also go B20/VTEC. Although, those are very tempermental motors and they must be built very specifically in order to run properly.
and there are minor differences between a PR4 (90-93) cylinder head vs a P75 (B18B) head
and B20Z cams are the same as B18B and the B20B intake camshaft is smaller than B18A/B
BrokenTalon27
W.F.O
There is a P8R b20 head that has different flow characteristics from the p75.why? B20 heads are P75 casting = B18B
and there are minor differences between a PR4 (90-93) cylinder head vs a P75 (B18B) head
and B20Z cams are the same as B18B and the B20B intake camshaft is smaller than B18A/B
tilegend
New Member
yes that is the one exception... im just assuming that most people who inquire about b20 head swaps are referring to the more commonly found USDM B20B/Z headThere is a P8R b20 head that has different flow characteristics from the p75.
BrokenTalon27
W.F.O
Well, you've got a point there.yes that is the one exception... im just assuming that most people who inquire about b20 head swaps are referring to the more commonly found USDM B20B/Z head
BigMac88
Fat guy in a little 'teg
He wanted options, I gave him one :what:why?
guiltyxxspark
Internet Hate Machine
B16A.
Problem Solved.
Problem Solved.
Ominous G2
┌∩┐(◣_◢)┌∩┐
Using a P8R on an 81mm bore will most likely give you head gasket issues.
BigMac88
Fat guy in a little 'teg
If you want no torque. There are better motor choices for a DA.B16A.
Problem Solved.
BrokenTalon27
W.F.O
I think he was referring to using the b16a head and going LSV. Seeing as the thread topic is about switching heads, not motors. I could be mistaken though.If you want no torque. There are better motor choices for a DA.
guiltyxxspark
Internet Hate Machine
If you want no torque. There are better motor choices for a DA.
Both.I think he was referring to using the b16a head and going LSV. Seeing as the thread topic is about switching heads, not motors. I could be mistaken though.
B16A is on of the best heads to use for LS/V or slap it on a GS-R block for a Poor Mans Type R.
I've always had good luck using B20B/Z builds for turbo.
But If you just want a quick engine swap, I always rely on the trusty JDM B16A.
OR if you're a real bad ass you swap in a J32A. Good luck fitting it into a DA/DB though.
bfatdaintegra
IM motorvated
i was thinking about swapin a j32a in my dc but they dont make a hood to conseal that beast