My only concern would be that you're dealing with another 400ccs, and I assume you rev it out to the same RPM as a standards b16? So the head would become a restriction. You'd have to port it to keep the airflow going up around 7500rpm and above wouldn't you?
Torino Red '94 DC2 Integra VTi-R :: 96fwkw @7300rpm & 138fwNm @4100rpm :: 0-100 in 7.3 seconds
i dont see why you would need to. a stock b16 revs to over 8k
while im sure a stock b20 block mated to a b20 head only will rev to around 7k
so its the b20 block that needs strengthening ie rod bolts etc to make it more reliable.
Oh okay, so you're not revving it out as high. Right, makes sense. However, at 7000 rpm the B20 will still be sucking more air than the B16 at 8500rpm. Not much more though. About 3% more. Shouldn't be an issue considering how much torque is left in a VTEC engine when it hits redline.
Good call! Still, I like engines that rev out past 7500rpm.
Torino Red '94 DC2 Integra VTi-R :: 96fwkw @7300rpm & 138fwNm @4100rpm :: 0-100 in 7.3 seconds
there were two makes of the integra DA9's from which 1989-1993 was the production time.
the car had two models.
the LS: consisting of a non VTEC b18a 5spd manual blah blah blah
the XSI: consisting of b16a2 i think, which is the vtec inside the EM1 Coupes.
oviously the XSI will smash the b18a although even the b18a is a 1.8L and the xsi is a 1.6L but you all should know that oviously! have a good one if you want to do a engine swap go for a b20 with a b16a block. gets very torquey =) Goodluck!
incorrect THe XSI has a b16a. not b16a2. it has more KW then the aus spec b16a2 which are found in EK4's and EM1's
My only concern would be that you're dealing with another 400ccs, and I assume you rev it out to the same RPM as a standards b16? So the head would become a restriction. You'd have to port it to keep the airflow going up around 7500rpm and above wouldn't you?
Originally Posted by Shraka
Oh okay, so you're not revving it out as high. Right, makes sense. However, at 7000 rpm the B20 will still be sucking more air than the B16 at 8500rpm. Not much more though. About 3% more. Shouldn't be an issue considering how much torque is left in a VTEC engine when it hits redline.
Good call! Still, I like engines that rev out past 7500rpm.
The stock ports on the B16a head are actually a little too large for the 1.6L and usually dont need to be opened up much at all. Most of the headwork should be done around the valve and bowl area to get the head flowing better. The B16a head flows more than enough for the B20b bottom end, thats the whole concept behind a B20VTEC, larger displacement bottom end with a high flowing VTEC head
Originally Posted by Shraka
if you want to do a engine swap go for a b20 with a b16a block. gets very torquey =) Goodluck!
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