Join Date: Aug 2009
Location: Oklahoma City, OKC
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L28ET cam + my whole life story
Sorry if this topic is exhausted, but I've searched the database and haven't really found what I'm looking for.
For those who are interested, this is my current setup.
L28E, converted to turbo
Stock internals, head/cam from 1979 L28E
'83 turbo manifold
Type RS BOV
3" exhaust to Megan muffler
Aeromotive A1000 FPR
and a couple of other bolt-on goodies.
Basically I built it in high school for a mild 200ish hp.
But you know what they say about getting addicted to boost......
A few years ago it felt good, but I was relatively inexperienced with forced induction. And since I've been in the city I've had the opportunity to help build a lot of boosted engines, and it's kind of opening my eyes to the problems with mine.
It's laggy, leaning out, and has a few other problems that I'm not looking forward to dealing with.
Ok, here's the current scenario.
I can get a L28ET out of an '81 ZX with 80k miles for $400. That includes motor, auto transmission, and everything connected to the motor except the exhaust manifold, which I have already.
The motor will bolt up to my stock '78 5-speed, which I'm keeping. I'll probably end up selling the auto trans.
I'm redoing the build right. Here's the plans for this motor.
All new gaskets
Porting of head, intake manifold, and exhaust manifold
HKS SSQV BOV ($hitty egay BOV is leaking)
38mm Tial wastegate
I can either A: drop the new motor in completely stock, and add upgrades later.
or B: Keep the motor on a stand in the garage, build it up with the above list of upgrades, and THEN drop it in.
The reason I like A better than B, is that I can make sure the motor runs good, and if I fudge up during the upgrade installation, I know exactly what's causing it.
HOWEVER, the whole point of this thread is to get advice from the guys who have been doing this stuff forever with L-series. I'm fairly experienced with this motor, but I've got nothing on most of the guys on this board.
I'm thinking about doing a cam with the porting. MSA offers a turbo stage 1 cam, but they don't offer any specs on the cam or where it will increase hp/torque. Or even if it affects the powerband.
I've been reading about other people doing L26 cams, and S130 NA cams. It looks like the L26 cam has too much overlap, and I can't really find much on the NA cams.
What I'm wanting to do with it is increase the hp while creating a lower powerband without adding too much boost. I'm hoping for a reliable 300ish, and although I know a cam isn't even necessary for that number, I'd like to make it as boost-efficient as possible.
If you're still reading this, thank you. That's a lot to read.
1978 280z - Turbocharged