Nate's 1998 Z28 Project

[nascarnate326]

I think its got a vacuum leak somewhere. The idle goes up and down some times. Perhaps its o2 sensors?

[hoogiesngrinderz]

Could be a vacuum leak, the PCV systems on these cars are know cause problems. Could also be from throttle blade position (high/low IAC counts), wrong RAFIG values (since M6 cars don't use RAFPN table), and/or the spark swing values (+/- too high) overcompensating at idle.

An afternoon with EFIlive and a WB02 setup would probably help a great deal, and it doesn't cost a dime with 98's. I might be able to borrow the setup again, but last time I borrowed it for FAR too long due to all the issues I had with my blue 98

[JoeliusZ28]

I wouldnt buy spohn stuff after the problems Michael had with them on his iroc

[hoogiesngrinderz]

I wouldnt buy spohn stuff after the problems Michael had with them on his iroc

Nope.

It wasn't just my a-arms, either. Quite a few people have tried to bring it up with the people at Spohn (even Steve himself) but everyone gets brushed off.

UMI from now on with the IROC. The 98 has BMR products on it, rear sway bar is starting to shed it's powder.

[alone_and_insane]

So what "supporting mods" do you currently lack to take full advantage of your cam?

[JoeliusZ28]

He needs more than a single 2.5" muffler for starters. That thing is breathing through a straw.

[nascarnate326]

So what "supporting mods" do you currently lack to take full advantage of your cam?

exhaust and a steet/dyno tune. I am not so held up on the current tune but between the exhaust, heads, and some Ac Delco o2 sensors I think it has quite a bit left in it.

Several people dyno over 400 rwhp. I don't believe my heads will support that but theres more in it.

If you seen the exhaust this car has on it, most of you would shit. Literally you would just crap at the ridicules-ness of it.

[sman]

400 is probably pushing it on stock heads, even with a 6spd.

I made 386 to the tires with that cam, 799 heads, and an LQ9 shortblock.

[nascarnate326]

I don't have stock heads

[c0ncEpT]

SS4Matt made 400 with a TR224 and stock 98 heads back in like 2004. Just depends on whos dyno you run on....

[hoogiesngrinderz]

Like I said, I have a cheap SLP Loudmouth setup

What headers and y-pipe do you have? Might have overlooked that

[nascarnate326]

headman headers with IDK crappy y pipe. Its been welded several times, can't be more than 2.5 inch, and is about as jankey as they come.

I bet my 94 V6 had more exhaust flow lol

[kammi10]

SS4Matt made 400 with a TR224 and stock 98 heads back in like 2004. Just depends on whos dyno you run on....

was also on a mustang dyno not a dyno jet..

[nascarnate326]

was also on a mustang dyno not a dyno jet..

All the more reason to use what I have. I dont need crazy power like some of you guys. lol

[alone_and_insane]

Got any pictures of the exhaust? I bet mine's more janky than yours.