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Old 02-15-2005, 08:04 PM   #1
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Default Working on my next mods

For my racer (1998 SSE)

Well, I'm heading to the salvage yard tomorrow to get the core PCM and in the mail it goes to Intense for one of their standard PCM'*. I am also pulling the heads and exhaust manifolds from my 1997 SSE parts car and will be dropping those off to get ported (port matched and the shop that'* doing it is going to do some before and after bench flow testing). Not sure if I want to have them port the 1997 L36 TB or if I should get a 1999+ L36 or L67 TB and have that ported -will probably do this when it warms up.
Thursday I have an appointment for a high flow 2.5" resonator. Might end up with a new muffler too.
I am also debating whether I should send enough money to Intense for some 105 lb valve-springs since I don't plan on rockers -yet. I just talked to a friend from MNCGP yesterday -he'* suggesting since I am porting the heads and manifolds I should do a cam (just a mild one -one of the mildest available).

What do you guys think about the cam? If I do that I should probably hold off on the PCM and have it programmed for the cam, but since I'd be getting a mild one it might not matter (but a PCM tuned to the cam would definitely maximize the benefits).
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Old 02-15-2005, 08:38 PM   #2
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If you have the funds, I'd say do the cam. Get an Intense S1x or a ZZP GT1. Those are pretty mild in comparison to others. Then get the Intense Stage 1 PCM or go with DHP and get a custom tune from them. You have many options.
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Old 02-18-2005, 05:32 PM   #3
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Well I picked up the core PCM to send into Intense, but have been so busy I haven't sent it yet. I hope to ship it out Monday at work.
Talked to a guy from MNCGP who ported his GTP heads, LIM, and exhaust mani'* to the point that with rockers he keeps up with a GTP with all the same mods, except a cam (not sure which one) instead of porting. He says he do all the porting for $250 which is $150 less than the shop that I was originally going to have do it.
I got my high flow resonator put on yesterday.
Tomorrow morning I'm taking the car in and having a new oil pan gasket installed along with fresh Mobil 1 and Wix filter and a fresh set of Autolite 605'* which'll be gapped to .057".
I also will be wrapping my front exhaust mani and crossover when I install the ported units. Which I will be doing in mid march -just in time for track time.
DANG I CAN HARDLY WAIT FOR TRACK TIME!!!!!!!
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Old 02-18-2005, 06:14 PM   #4
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I'm working on a cam myself, right now. A street/strip cam, that my Jet can handle just fine. With that cam, it looks like I don't need 105# springs, but new OEM 100# springs will definately be the way to go after 110k.
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Old 02-18-2005, 07:46 PM   #5
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I was thinking of putting new 105'* or LS6 springs in, but with the motor in the parts car only having 53k on it I think I'll hold out until I know I NEED them. I probably should do them now since I have it apart, but with what I have planned it doesn't leave much $$$ in case I need it, so I'm gonna cross my fingers and pray to heck they don't crap out on me.
I think my engine will be quite abit stronger, regardless of the porting, due to the fact that those heads have almost 130k less miles. I would and should swap the whole motor, but I don't have a cherry picker, and I feel the current lower end of my engine will hold out for quite awhile with regular MOBIL 1 changes and that fresh oil pan gasket to prevent 1.5 qt losses of oil every 3k as happened since my last oil change 29xx miles back.
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Old 02-18-2005, 08:09 PM   #6
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You should definatley get a cam if your going to do all that porting. Don't get them ported past the stage two flow rates on the major sites. Since your n/a you want to mantain velocity. You should have the lower intake manifold ported too where it meets the head, the ports on it are nasty. It'* aluminum so it shouldn't cost that much to do. Oh and tap and plug the coolant ports shut. or weld them.
I would suggest to get LS6 springs from gmpartsdirect. Their like 77 bucks shipped and work with stock retainers.
Cam wise, i think you should go with a gt1 cam. They've had nothing but good reviews on clubgp. Buck531 dropped like .6 secs switching from a intense s1 cam to a gt1 cam. The intese cam would probably be awesome with a higher stall converter. but that'* $$.
You should get a used L67 tb too. It'* much cheaper.
And wait to do the pcm after your done w/ everything too.
just my $0.03
Ohh and since i'm changing my head gaskets soon, i found all the parts(gaskets, tq to yeild bolts) that i would need and you would need too for $115 not shipped at www.autopartsgiant.com
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Old 02-18-2005, 09:45 PM   #7
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Yup, the LIM is getting ported for the price. I am looking for either a 1999+ L36 or L67 TB and will have him port that too. I've also got a line on some L67 injectors.
He'* porting the heads all the way through too so that should help to keep a laminar flow.
I am hoping that with the PCM, porting (heads, intake and exhaust mani'* and ?TB?), L67 injectors, L67 TB and EGR blocked I hope to be able to pull a solid 15.4 with a good launch (2.2). Also, I hope to get some good 245/50/16 tires and put them on either crosslace or 96-99 9-spoke rims for the track, or if I'm lucky some 15" steelies from a early 90'* Lumina with some shorter slicks to steepen my gear ratio up to near 3.50:1.
Oh, well, we'll have to wait and see what winter/spring mods bring to April/May track time.
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Old 02-19-2005, 02:01 AM   #8
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EGR won't get you anything.

WHy does the year matter for the TB?

Valve Springs will get you a higher redline. Ported heads + cam + higher redline = teh win.
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Old 02-19-2005, 07:45 PM   #9
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Don't bother with the L67 injectors, it'* a tuning mess. get like 25# injectors IF your maxing yours out which your porbably not going to.

Keep the EGR, it dosen't open during WOT, it lowers combustion temps, and gives you better gas mileage.

The deal with the 99+ TBs is the huge maf post isn't there like in the previous TBs just a smaller hump and bare maf sensor. Basically, theres less metal in the way of the TB plate.

Consider a cam though seriously, with that and all this you'll be in the 14s
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Old 02-19-2005, 10:49 PM   #10
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Quote:
Originally Posted by 95naSTA
Don't bother with the L67 injectors, it'* a tuning mess. get like 25# injectors IF your maxing yours out which your porbably not going to.

Keep the EGR, it dosen't open during WOT, it lowers combustion temps, and gives you better gas mileage.

The deal with the 99+ TBs is the huge maf post isn't there like in the previous TBs just a smaller hump and bare maf sensor. Basically, theres less metal in the way of the TB plate.

Consider a cam though seriously, with that and all this you'll be in the 14s
That seems like quite a bit of work, although an older TB can be ported, and the MAF post taken out. I wonder if that would be better than a 99+? Or are the electronics better too?
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