Forged Iron 370 / AFR 225's / Truck Manifolds / PT88
10-13-2009, 12:20 AM
#47
Originally Posted by RS_SS69
Im following your build and I wanted to know more about your th350 and what you have done for it to handle the power your putting through it?
I didnt get a chance to work on her today until about 6PM. I did find the stuff that I needed though.
The first thing that I tackled was the fuel system. Because the car is a 98, I have a metal tank. The metal tank has plastic baffling/liner inside. I didn't sump my tank, so we drilled through the back center of the tank and welded a male AN fitting for the external Magnafuel setup. Plastic shavings were everywhere and the heat from the welder made a mess of the plastic in there. I don't recommend doing it this way. Anyway, long story short, I suspected that there could be some plastic shavings in the pre filter. I was correct. Cleaned it all out and it should be good.
Steve talked me into taking the intake off again and giving it another good washing. He stuck his bore scope in there and found a few little shavings that I missed. This wouldn't be neccesary normally with a FAST90 but mine is RTV'd together in the hopes of keeping it together under boost.
Got her all buttoned up and turned here over. Fired right up with good oil pressure. Sweet! Now all I needed to do was switch the brake caliper. Swapped it out, bled the brakes and bolted on the front tires. Tried to turn the wheel and it wouldnt budge. Took it off and the freaking caliper was rubbing on the 15X3 Weld Prostar with a small spacer. These calipers have already been ground down and he didn't even use a spacer with his 15X3 Weld Drag Lites. Anyway, after about 20 min of grinding, the grinding disk was spent and I had no way to get another one. I'll go to the hardware store and pick up a couple of grinding disks tomorrow afternoon unless I get called with some sort of emergency for work. Should be able to start tuning tomorrow.
Yes. You going to Dead Hookers?
10-13-2009, 04:34 PM
#50
Launching!
Join Date: Apr 2003
Location: Florida
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I feel that to make a turbo car fast on pump gas you turn down the timing and turn up the boost to increase power.
10-13-2009, 06:51 PM
#51
I got the grinding done and started working on the tune. I had to crack the throttle a bit to get her to hold steady at 900 rpm. Lots less vacuum. Also had to pull a bunch of fuel. It's got a good sound with a very mild lope. Took her out and did some part throttle tuning and noticed the temps climbing. It was about 90* outside and was leveling off at 217* in the log. Been trying to burp the system but it's building up too much pressure. I dont think that the cap is working correctly. I am burned out right now. I'll tackle it tomorrow.
10-13-2009, 09:35 PM
#54
Launching!
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Location: Florida
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10-14-2009, 04:06 AM
#55
You really pushed the stock bottom end, but I knew it was only going to be so long before it blew. My friend went through the same thing on his LSx mustang. It went 143 mph on the stock bottom end, but only made about 10 passes and a few street hits.
10-14-2009, 10:24 AM
#56
Pretty much everything above .56 Cyl Air.
As you can see, I had no timing in the stock motor at anything that resembled WOT. I will be adding lots more timing as soon as I can get the temperature down.
Last edited by 98Z28CobraKiller; 10-29-2009 at 09:00 AM.
10-14-2009, 10:02 PM
#59
I put the air bridge/pickup/dam on this morning and did a bunch of driving. That helped some and I think that I can make it work better if I trim the aluminum L bracket on the bottom of the IC. That should expose another inch or so of the air dam. The only other thing that I can do to help is space the IC forward a little more.
Then I can put the blanket on the turbo and wrap the down pipe. That should get me to 205-210 or so in the heat of a summer day.
I was working on the tune aswell so I had to get on it a bunch of times. God I missed that feeling. ****'s like crack. She felt pretty good. I did a little hit on the way home against Boner and then I was cruising easy and all of the sudden the fuel pump shut off. Switch was on. Pump was off. Everything else in the car was still on. Got out. Checked the lines. Checked the wires to the pump, went back in the car, switched it on again, and it came right on. I had a full tank of gas also so the pump wasn't cavitating or anything. Weird. Gotta keep my eye on that.
Took the car out tonite for a little tunning. It is 62* outside and the turbo LOVES IT! This is the first time that I have experienced the turbo setup outside of the usual balmy Florida summer weather of low 80* to a high of 100*.
Hopefully get my AMS 500 controller hooked up tomorrow and make some low boost passes at the track on Wednesday. It will warm up a little by wednesday but it should still be the best air that we've seen since early March.