Engine overall/performance?

[djfoxx]

Hi guys

I'm soon going to redo my whole engine including a branch and side drafts and just wanted to know from you guys how will it affect the performance and would you advise it? its a 1600 16valve 4a-f engine

[Flashmn]

Side drafts work great on a 4A-F, particularly webers. Bike carbs are iffy. Find a way to connect the distributor to the carbs. Also while you're at it, get some camshafts for it. You'll be amazed.

[djfoxx]

how do you do the distributer thing?

[Flashmn]

well you have to get the vacuum lines connected. One goes to the intake manifold and the other goes to the carb plate.

[RogueMoog]

Someone makes "performance" camshafts for the 4AF (and 4AFE?) engine?

[Flashmn]

Yup and I can get custom made ones here too.

[RogueMoog]

Hmm. Can they run with a stock ECU setup? Or does the ECU freak out with what I assume are longer durations (and a little more power)? I mentioned in another topic that my friend and I are considering doing an NA "build" of my 4AFE, mostly to the head (switch to 1992 IM, open up intake & exhaust, port & polish head, custom exhaust manifold & exhaust).

[Flashmn]

The ECU wouldnt know what the camshafts are, unless you go with really crazy ones, it should work.

I mentioned in another topic that my friend and I are considering doing an NA "build" of my 4AFE, mostly to the head (switch to 1992 IM, open up intake & exhaust, port & polish head, custom exhaust manifold & exhaust).

92 IM wont fit a <92 head, bolt pattern, flange shape, inlet orientation is all wrong. You can get significant gains on a 4A-F with side drafts and cams... not so sure about the 4A-FE..

[RogueMoog]

Ah OK, thanks. Guess I'll have to pull an entire 1992 head with the IM etc to use in my 1988?

[Flashmn]

Then you need the lower belt pulley atleast as the belt has different toothing and length and size as the pre -92 engine..Plus other things...fuel injectors, fuel rail, etc..