Combo motor

theshaw0000
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Combo motor

Postby theshaw0000 » Wed Jan 30, 2013 11:05 pm

I have a redtop and was thinking of swaping a bluetop head on it anyone done this is it worth doing

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gotzoom?
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Re: Combo motor

Postby gotzoom? » Wed Jan 30, 2013 11:19 pm

I just finished doing basically this exact thing. I rebuilt the entire engine and ported the head, so I'm speaking from a "new" engine perspective. I wanted to keep TVIS for road driving to get a little extra lowend torque, but maintain the high rpm performance, so that's why I went this route. I'm really happy with the results. It does have about as good lowend torque as you can expect from a 1.6l engine and has good torque and power all across the rev range like it should.

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Re: Combo motor

Postby MisterJerk » Thu Jan 31, 2013 4:36 am

the redtop/small port head flows better and is an upgrade to the big port/bluetop head. Kinda going backwards here.

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Re: Combo motor

Postby ga_goosh » Thu Jan 31, 2013 5:36 am

MisterJerk wrote:the redtop/small port head flows better and is an upgrade to the big port/bluetop head. Kinda going backwards here.


+1 I prefer the small port for n/a
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theshaw0000
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Re: Combo motor

Postby theshaw0000 » Thu Jan 31, 2013 12:35 pm

I hve the redtop large port wud it be worth it to switch to the blue

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Re: Combo motor

Postby ga_goosh » Thu Jan 31, 2013 12:37 pm

theshaw0000 wrote:I hve the redtop large port wud it be worth it to switch to the blue


I would stick to the red large port head. the 2ng gen large port has a little bit different intake ports andmake a bit more power but over all its about the same.
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theshaw0000
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Re: Combo motor

Postby theshaw0000 » Sat Feb 02, 2013 6:48 am

Ok sounds good

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Re: Combo motor

Postby Slideways86 » Sun Feb 03, 2013 10:14 pm

I have a red top bottom with a blue top head but that's how I got the car and I've never had an 86 so I have nothing to compare it to. All I know is the car is slow as **** compared to the b16 powered civics I've been playing with for years, but the balance of the 86 is amazing and the car is so much more fun to drive then front drive cars.

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Re: Combo motor

Postby Illegal_Garage » Mon Feb 04, 2013 12:28 am

going with the blue top head is easier

also i think it makes just about the same power

I like TVIS so I tend to stick with it

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gotzoom?
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Re: Combo motor

Postby gotzoom? » Mon Feb 04, 2013 3:06 pm

You're not really comparing apples to apples, though. Any front drive car will be faster in a straight line to a comparably powered FR rear drive car due to the more efficient drivetrain in FF configuration. If you have comparable whp, then you have a more accurate comparison. I'd just get a set of Tomei Poncams or equivelent and call it a day.

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Re: Combo motor

Postby oldeskewltoy » Tue Feb 05, 2013 9:31 am

color of the cam covers doesn't tell us anything.........

*IF*, when you say redtop you mean a smallport head/engine, then it requires some additional parts to make it work in rwd configuration... since it was only offered in fwd format.

A largeport head can make similar horsepower, the smallport head offers an advantage in higher port(charge) velocity. This higher velocity allows the engine to make torque earlier. This will only be a benefit *IF* your induction system is matched to the head.
OST Cyl head porting, - viewtopic.php?f=22&t=300

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Re: Combo motor

Postby kuroki86 » Tue Feb 05, 2013 8:43 pm

i had blue top head on red top block on my old aw11, i liked it

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