Turbo this non-turbo engine???

[WalkedTalon]

I know its possible, but would it be wise to turbo this non-turbo engine? I have all the stuff, 2g manny, t25, smic,all piping bov, ect.

Ebay motor

how reliable would it be?

 

[boostedinaz]

I know its possible, but would it be wise to turbo this non-turbo engine? I have all the stuff, 2g manny, t25, smic,all piping bov, ect.

Ebay motor

how reliable would it be?

No. it has higher compression and the pistons arent going to like alot of boost. Depending on what car it is goinf into there may be a wiring differance. Either way dont do it.

 

[mavisky]

the easiest way would be to take that and have the rods on it machined to fit your 2g turbo pistons. the only problem is that there's no way of knowing whether its a 6 bolt or a 7 bolt before they ship it to you. if it was a 7 bolt you'd only need to update the cams to those from a turbo motor and replace all the exterior motor parts (i.e. manifolds, thermostat housings, sensors) with turbo parts. the nt blocks are identical other than the lack of oil squirters and different pistons. of course the oil filter housing is different but that's not technically part of the block.

 

[WalkedTalon]

sounds like to much work :thumbdown i think ill just buy a used turbo engine

thanks guys

 

[boostedinaz]

sounds like to much work :thumbdown i think ill just buy a used turbo engine

thanks guys

Smart move.

 

[mavisky]

agreed

i was just stating that you could if that was your only option, but you can see the amount of extra difficulty as compared to just buying the right motor the first time

 

[TurboGraphX]

Actually, nothing that is ON the engine would have to be replaced to run stock boost levels. We turbo convert factory non turbo 4G63 cars all of the time and never see a problem. the stock compression on that engine is only 9:1. That is not a big jump and is actually a common upgrade when replacing pistons on a turbo engine. If you wanted to go beyond stock boost though, you may want to invest in some head studs and a better head gasket. We have run 14-17 PSI on our factory non turbo 4G63 turbo conversion as a daily driver for years.
Ken

 

[mavisky]

sounds to me like a ticking time bomb waiting to happen.

 

[TurboGraphX]

,
If a jump of 8:1 to 9:1 in compression is a ticking timebomb...what is it when you increase boost from 9 PSI to 15 PSI? (common change in DSM world) That would surely have to be a full nuclear strike!
You put more strain on a stock engine and it's components (head gasket, head bolts and pistons) by upping the boost presure by several points than you do by making the tiny, yes I said tiny, jump in compression from 8:1 to 9:1.
That is really not much change at all and is perfectly safe so long as the engine is in good shape and has no prexisting problems. (low compression, head gasket leaks, coolent issues, etc)
Ken

 

[mavisky]

the biggest problem with the nt pistons is their design. their upper ring land placement is much closer to the top of the piston. its not much of a problem on a low hp nt, but when adding boost it can make it very dangerous because the ring lands are much more succeptible to failure under knock. if you can keep everything running happy at 14-17psi and not have any knock then you'll be ok, but it also makes the tuning window much smaller since the static compression ratio is so much higher.

i know of two dsm'ers who have done the turbo parts on an nt motor thing and both broke within the first year.

 

[Slo93N/T]

I say go for it... 9:1 is not too high....... 3000GT's are doing TT conversions on there N/A 10:1's and there are many of them running fine at like 6 psi..... still a kick in the pants.... Better than a non turbo... I say do it... thats what I was going to do had I kept the GS.....

 

[boostedinaz]

Its common knowledge that a lower compression motor running more boost will make more power than a high compression car running low boost. Like Mavisky said you tunning window is also alot more narrow. I can run 18 psi on my Talon and only have to worry about knock if I make a few hard pulls and thats is AZ with crappy 91. Know thry that on a 9:1 motor with say 15 psi and good luck. I would rather be safe than sorry.

 

[CanadianTalon]

Its common knowledge that a lower compression motor running more boost will make more power than a high compression car running low boost. Like Mavisky said you tunning window is also alot more narrow. I can run 18 psi on my Talon and only have to worry about knock if I make a few hard pulls and thats is AZ with crappy 91. Know thry that on a 9:1 motor with say 15 psi and good luck. I would rather be safe than sorry.

I've run 19 PSI on a stock bore 9:1 compression 4G63 on 91 octane before, and you make more power per pound of boost with 9:1 compression than you do with 7.8:1 or 8:1, as well as a quicker spooling turbo. 9:1 isn't too high for turbo.

 

[boostedinaz]

I've run 19 PSI on a stock bore 9:1 compression 4G63 on 91 octane before, and you make more power per pound of boost with 9:1 compression than you do with 7.8:1 or 8:1, as well as a quicker spooling turbo. 9:1 isn't too high for turbo.

This depends on alot of things and is not a truth for every engine. It depends on the type of pistons, how high up the ringland is, the shape and effciency of the combustion chamber, and the tune of the car not to mention a billion other things. Generlized statement like this can be misleading.