help needed with cams please

[jonny514mcl]

ok my engine

4age bluetop
trd 0.8 headgasket
ported and polished
4 branch exhaust manifold

now i equired a set of cams toda 256/7.9 and 264/7.9 i also have toda adj cam pulleys

now which cam do i put to int and which to exhaust so the car still idles well for street use? and what is the ideal degree setup for these?

thaqnks for your help in advance

[Bean]

I'd go with 264 on the intake side...
are you gonig to use the stock ECU still?

here you can find the datasheet of the HKS cams - you can use theire timing table to start with

[jonny514mcl]

yeah using the standard ecu

[oldeskewltoy]

Read up on a concept called "dynamic compression ratio", this may help you decide which cam you want where.

*IF* the head is unported, I'd recommend the 256 cam on the intake side, and the 264 on the exhaust side.


Here are the Toda timing sheets

256




264

[irishtwincam]

So toda suggests 110/110 stock timing with both the 256 and 264 cams?

According to club4ag tech ref TRD timing for 264 cam is
Intake 106° ATDC
Exhaust at 116°BTDC.

Bigger cam on teh exhaust improves midrange, big cam on intake improves top end.