its been confirmed by several of our buttdynos and a machinist, ITS MAINLY THE CAMS
thats alot bandwidth
archivethis or move to teg tips, as its slightly difficult to search for
Originally posted by XDEep
archivethis
Actually, the member who started this post finished it with “ARCHIVETHIS”.
um, so what your saying is that i cant just throw a b18b head onto my 90 b18a block? id have to redo vaccum lines? and i shouldn’t even expect the 12 hp i was thinkin i would get?
Originally posted by 90integrasi
um, so what your saying is that i cant just throw a b18b head onto my 90 b18a block? id have to redo vaccum lines? and i shouldn’t even expect the 12 hp i was thinkin i would get?
with just the head you wont have to redo any lines. its only if you swap the intake manifold.
well the 12hp is from the head, intake manifold, exhaust manifold and possibly ecu… but if you just do the head and header you should still see a good difference. and with teh head off, you can do the other little things to help like clean it out, port and polish maybe, mill, new seals, etc.
ya, i wouldn’t bother with the head swap unless your old one is worn out, probably not worth the effort. By all means, tho, get the intake manifold with it, the vacuum lines are nothing.
would i still make 140 with my PRE OBD ECU?
basically… im dropping a 94 LS into my 90… what else is gonna be needed? so far everything is gonna plug in except for my injectors and distributor correct? im kinda lost on this issue
i believe the redline on 94+LS integras is like 7200…
I THINK thats right… for some reason i remember driving a 95 LS and noticing it had the same redline as my (at the time car)…95 civic SI (7200 rpm redline). but maybe i’m wrong
peace
wha? it’s 7200? o man… id better convert to OBD:(
Originally posted by pleather
wha? it’s 7200? o man… id better convert to OBD:(
Just get a chip man…
Originally posted by E-DA9
Just get a chip man…
yea but will the stock head support 7200 for the 94 head like stated above? if so… then 'ill chip my pre OBD ECU… but what about all the sensors and stuff? you said the 90 map sensor harness will plug into the 94 map sensor correct? does the wires reach? considering its in a different location… or does the wires have to be extended? also… if the harness doesnt match up… do i have to re pin it? i already know i have to change injectors and distributor… or re pin the ECU to make it work
Originally posted by pleather
yea but will the stock head support 7200 for the 94 head like stated above? if so… then 'ill chip my pre OBD ECU… but what about all the sensors and stuff? you said the 90 map sensor harness will plug into the 94 map sensor correct? does the wires reach? considering its in a different location… or does the wires have to be extended? also… if the harness doesnt match up… do i have to re pin it? i already know i have to change injectors and distributor… or re pin the ECU to make it work
Can we get some more info on this? I plan on doing the same thing on my 91 ls block with pre OBD ecu…
Originally posted by whiteDA9
Can we get some more info on this? I plan on doing the same thing on my 91 ls block with pre OBD ecu…
The 94 map sensor is on the throttle body instead of on the firewall where your 91 is. The plug is the same you just need to extend the wires. Use your 91 dist and injectors and wiring will be no problem. The vacuum lines are discussed at the top of this post. If you are only changing the head/intake and not the block you are done. If you are also using a newer block then there is one more change. In 92 the thermosensor was moved from the back of the block by the oil filter to the thermostat housing just under the intake on the dist side. You will have to extend the wires and I believe the plugs are different.
Hope this helps.
OK, thnx
would a 99 ls head work on my 91? this guy is letting it go for $120 and which Gasket do I buy ? The one for the b18a or b18b ? or is it the same?
Originally posted by chingro
[B]THE 92+ redlines higher, pushin more HP out of the motor.
for 90-91, if it is possible to get your redline to 6800 RPM, you will see that you will produce 140 HP or close to…
later [/B]
I don’t know about that dude! I have 91 original head on mine, and if it wasn’t because I have rev limit on it, it would wanna keep going up and not slow either, I mean it revs high pretty quick. But then again the heads of my car has been taken off. HMMM! I wonder what has been done to it. Bought it like that.
Originally posted by rcnacura
[B]Chingro, are you talking about the vtec or the LS engine? Honda hasn’t increased the overall RPM redline on the LS for as long as I know on the b series motor. My 1990 RS, which is the same as the LS and GS, redlines at 6700-6800rpm. The GSR, which was made in 92+ redlines at 8100prm I believe, but don’t quote me on that because I’m not all that well informed on vtec engine stats.
The early CRV b20b engine (97-98) is the engine that redlines at 6200rpm, the b20z (99-00) redlines at 6700, and the b18b(integra engines) redlines at 6800rpm.
The better design is in the IM and the internals in the headwork. They enlarged the ports, not sure if it was the intake or the exhaust ports, but those, either or. The exhaust manifold is a better design as well. It has better flow. The cams are more “aggressive” compared to the 90-91 b18a’s too.
E-DA9 THANKS AGAIN FOR THE VACCUM LINE SCHEMATICS!!! The b20 monster is underway!
HtH [/B]
I could be wrong, but I think I seen the ports on the B18B smaller but smooth, and the B18A bigger but rougher not smooth at all.
Originally posted by DAY U IZ
[B]rcnacura, Honda did increase the redline on LS’s. 90-91 they redline at 6,600 and in 92-93 they redline at 6,700-6,800. I know for a fact that the redline is higher, I’m just not really sure where it is on 92-93’s. I don’t want to talk about 94+ redlines cause I’m not really sure where they redline at.
chingro: The extra 10 HP isn’t from the intake manifold alone, its from a combination of the Intake Manifold, better cams and better header.
If you just put a 92-93 IM on a 90-91 head and reved up to 6,800, you would not be making 140hp.
-Steve [/B]
Noway dude, everything else you got correct except the redline part. Red line is definately the same. My 91 redlines at exactly 6800 and cuts off at 6900. And I don’t need glasses
Originally posted by rcnacura
[B]There is a difference between the two heads and the b18b cams are slightly more agressive. I took some measurements on them because I thought I got screwed on some cams, but they are a “little” different.
And there is no way that the extra 200rpm redline is going to make the added HP. The LS engine aren’t the top end motors like the vtec. I’ve seen dyno’s and the difference is where the 10hp is made.
I’m still somewhat skeptical on the increased redline claim, but who know I don’t work for honda. As daver said it might be fuel mapping. Or what I think, the increased port sizes with the IM, and EM. [/B]
Please look closely at both rpm gauges. They’re identical to the t. I just don’t understand what you guys are looking at. I’ve compared the two gauges and still see it identical. and they both peek at 6000rpm top 140 top horses on the b and 6000rpm 130 horses on the a. Head work is definatly different cutoff point and rpms are exactly the same. Look and see people