ahperformance

i blew my engine about 2 1/2 weeks agoon my 87 s4 turboII. it had 150000+ miles on it. anyway, i got my hands on a jdm s5 engine with ecu and harness, and i plan to get it up to 315-330whp. now i heard that i dont have to street port the jspec engine for me to reach 315whp. is this true? what mods do i need to reach 315whp? bear in mind that i want to keep my as much of my low/midrange, and i want to make the engine as reliable as possible.

ahperformance

can anyone identify the turbo in the above attached pic?

rxcollector

stock?? without seeing more of it its hard to tell.

you want to keep low end and reliablility?? well I dont think they go hand in hand.
IMO for reliability and the "good" low end stock all the way around is a good idea.
if you port, dont you loose some of your botom end? or you could shoot some nitrous to bump up the low end but there again there goes your reliability.

I guess you have to choose one or the other. POWER or RELIABLITY

ahperformance

i just want to make the engine AS RELIABLE AS POSSIBLE. i know its impossible to get more power while keeping stock reliablity. i know porting readily reduces longevity and low end, and that's why im trying to avoid it. but if i absolutely, possitively must port to get 315whp in the most reliable way possible, I will.

rxcollector

back to the question at hand...

yes, mods are your freind. intake, exhaust, EMS, boost.. uhhh the list can be endless with a turbo and still be reliable enough to be a daily driver???

guys?

Barwick

aww.. it's cute to see the stock turbo once in a while.. dinky little thing that it is..

Sorry, after seeing the T04E on my car and all associated "stuff" that goes along with it (like external wastegate, HKS BOV, etc..) the stock turbo just seems kinda cute.. I dunno..

Anyhow, for something useful...

You'll be plenty fine with the stock J-Spec... or with a stock US engine too.. they're the same exact thing pretty much (minus the manifolds for emissions reasons)

I know a guy who put 400+ at the rear wheels on a stock ported motor, so no, you don't need to street port, and no you don't need 3mm seals to put down large amounts of power. (And yes the car is still running fine and reliable).

jonfc3s

iTrader: (3)

The turbo in the pic looks stock,... but it is a hybrid of some sort. To4 type front compressor.

Jonathan

jonfc3s

iTrader: (3)

The turbo is a hybrid of some sort. To4 type front compressor,

Jonathan

BLACK ROCKET

Looks like Garret

BlackRx7

not true, a correctly Street ported engine will have power gains through all the rpms, my car is street ported and I still jump on mustangs from a dig, and mutalate them from a roll...porting your motor is the best way to get more power out of it..

it just ticks me off to here, loss of low eng torque, you guys associate it with everything, exhuast systems, flywheels, intakes, and now ports...comon people!!

fstrnyou

what ever man, you loose low end with porting, there's no getting around it.

when you "jump on mustangs from a dig", how do you launch it? if you're above 3500 then you ain't even dealing with low end.

NZConvertible

J-spec blocks are identical to US-spec ones, so all the same rules apply. There is no perfomance advantage to using one.

1SxyRXy

looks like it might have had a boost controler maybe. actually after looking at it ,it does look a little differnt form stock

rxseven

Street porting won't affect reliability and you'll achieve your target hp at a lower boost than with stock ports.

TwinTurboRx-7Man

iTrader: (4)

That is a knightsport turbo.