N/A Cams in T5 engine

Post by **shaker_chi** » 07 Aug 2017, 09:57

So I plan on digging into the head gasket next weekend with the project car. Is it worth picking up some n/a cams while I have everything torn apart or should I just leave well enough alone? I'm leaning towards leaving it as is, but if the consensus is the n/a cam swap is worthwhile I'll take that option. Any thoughts or opinions would be greatly appreciated.

PeteB · Post by **PeteB** » 07 Aug 2017, 10:02

I'm curious, do you have the timing specs for NA vs. Turbo cams?

Post by **shaker_chi** » 07 Aug 2017, 10:25

I do not. I have read a few things on volvospeed about it, but looking to see if anyone has some "real world" experience with the swap.

Post by **FLXC90** » 07 Aug 2017, 10:47

RSPI? I seem to recall him running them in his wagon. (along with intake and throttle body) I remember 4 degrees retarded for one of the cams. That's a spec for your tuner though.
I know he has a video for it, and he is in the middle of posting on an S70 in progress at his favorite Chicago parts providers.

Post by **bmdubya1198** » 07 Aug 2017, 12:40

FLXC90 wrote: 07 Aug 2017, 10:47 RSPI? I seem to recall him running them in his wagon. (along with intake and throttle body) I remember 4 degrees retarded for one of the cams. That's a spec for your tuner though.
I know he has a video for it, and he is in the middle of posting on an S70 in progress at his favorite Chicago parts providers.

He has a few videos on it. In fact, he just posted one today or yesterday. I would ask him, because I know he's done it a few times.
And while we have this thread going, does anyone know anything about N/A cams in a GLT? Just curious, because I've heard that it won't work from some people, and others say they will.

Post by **shaker_chi** » 07 Aug 2017, 13:07

Since the GLT uses a 2.4 liter motor, isn't it just the normal n/a motor with a low pressure turbo? I would assume it may already have the n/a cams. Not 100% on this though.

Post by **Clemens** » 07 Aug 2017, 13:47

I think ardideas.com lists timing retard for the na cams in the ecu tune section

PeteB · Post by **PeteB** » 07 Aug 2017, 22:42

I'm asking for duration, lobe center, and lift.
Duration is sometimes spec'ed from open to close and others from slightly cracked at each end.
I used to know the timings for quite a few Alfa Romeo cams off the top of my head.

Post by **bmdubya1198** » 08 Aug 2017, 07:33

shaker_chi wrote: 07 Aug 2017, 13:07 Since the GLT uses a 2.4 liter motor, isn't it just the normal n/a motor with a low pressure turbo? I would assume it may already have the n/a cams. Not 100% on this though.

No, the GLT engine is the same as the T5 minus the pistons, which makes it a 2.4 and raises the compression ratio from 8.5:1 to 9:1. Although I'm not 100% sure the difference between the turbo and the N/A blocks, or the difference between the heads and cams on the GLT vs. T5. I really wish we had all this information easily available in one place...

Post by **tryingbe** » 08 Aug 2017, 13:28

Some people see gain with n/a cams in their T5 engine, some people sees loss.

Personally, if you can't tune (able to change fuel/spark in the ECU) your car, I would leave it stock.