Follow my port and polish project

KILL4PEACEUSMC

Team Infidel
May 7, 2007
514
1
0
56
Sahuarita AZ
looks like your doing a great job, just wondering why you didnt pull the heads to port them, Ive never seen anyone port heads on an assembled motor before.
 
Jan 30, 2004
630
18
18
Boca Raton, FL
looks like your doing a great job, just wondering why you didnt pull the heads to port them, Ive never seen anyone port heads on an assembled motor before.
I get that alot.

My theory is if it isn't broke, don't fix it. The head gaskets are original and have yet to give me any issues.

I'm certain in the future I'll blow one of them trying to go for broke, then I'll port the heads :)
 

pajo

Member
Jun 21, 2003
445
2
18
lorain.oh
Visit site
port

great job Doug keep up the good work -- let us know of the differance you've made on the cars drivability and performance ..I did basically the same thing years a go and the first thing a noteced was a much quicker spool up and need for more fuel naturally..Good luck
 
Jan 31, 2006
7,067
211
63
L.I NY
Where did you pick up the bronze sleeves for the headers?

I am pulling my headers of and I would like to at least put the sleeves on it.
 
Jan 30, 2004
630
18
18
Boca Raton, FL
A small update. I had a driverside header leak. So I resanded down the flange, and this time used some RTV high temp ultra copper and let it sit over night, no more leak. The bronze sleeves worked like a champ! No signs of carbon makes anywhere on the flange. I got the sleeves at McMaster-Carr.
 
Jan 31, 2006
7,067
211
63
L.I NY
A small update. I had a driverside header leak. So I resanded down the flange, and this time used some RTV high temp ultra copper and let it sit over night, no more leak. The bronze sleeves worked like a champ! No signs of carbon makes anywhere on the flange. I got the sleeves at McMaster-Carr.
thanks for the link BUT that site has a bazillion things Do you have a part# or at least a Keyword?

Sorry to be such a pest.
thanks
David

Found it thanks
 
Jan 30, 2004
630
18
18
Boca Raton, FL
I've been getting many PM's about the port work and I'm really happy that you guys found it interesting and informative.

I've been so busy with side work that I haven't driven the car hardly at all. Last night I took the car for a 50 mile cruise. I'm having slight issues with my alky setup so I disconnected it and turned the boost down to 17 psi on straight 93. The car feels great. The tune is a bit fat right now on purpose since I added fuel in anticipation of more air getting into the motor. Spool feels about the same as before, probably cause it spooled hard to begin with due to running the boost solenoid with my MAF Pro. Yet I can feel a difference in the top end.

I have yet to come across any mechanical issues with the car from the work I've done.

I still do owe you guys my pre and post port numbers, I'll post them soon.

My local track opens in Nov, so around Thanksgiving I should have some numbers (hopefully 11's :))
 
Jan 30, 2004
630
18
18
Boca Raton, FL
Here are the numbers I promised. Track still isn't open, so no track times yet.

Turbo compressor inlet:
Before: 2.02" (slight sanding had been done before, don't have an exact measurement on a stock compressor housing)
After: 2.120"

Turbo compressor outlet:
Before: 1.750"
After: 1.920"

Turbine inlet:
Before: 2.110"
After: 2.230"

Intercooler inlet:
Before: 1.625"
After: 1.935"

Intake runners:
Before: ~ 1.830 x .830"
After: ~ 1.950 x .900"
Gasket: 2.000 x 1.000
 
Jan 30, 2004
630
18
18
Boca Raton, FL
Went to the track last night. The DA was -380 and it's a brand new track surface so traction was solid.

Made 6 passes. Most shorts were 1.66 - 1.68, so I defintely feel the hooks more consistant. This was with 17 lbs of air in the DR's.

Et's were all in the 12.2x's, with a best of 12.20 at 111. I couldn't get my laptop to work, so I couldn't study my runs and make changes accordingly. I just used the scan master and watched knock. The tune I ended up with had boost at 23, and timing at 24/22, anything more it would knock when the converter locked (at 73 mph).

I plan on going back racing next Saturday. Other then recording and studing my runs, I'm at a loss at what to do. I will be ordering an air bag this week so maybe get more shorts even lower.
 

johnnyttype

Active Member
Apr 18, 2007
1,213
4
38
marriottsville, Md
I get that alot.

My theory is if it isn't broke, don't fix it. The head gaskets are original and have yet to give me any issues.

I'm certain in the future I'll blow one of them trying to go for broke, then I'll port the heads :)
Other then recording and studing my runs, I'm at a loss at what to do. I will be ordering an air bag this week so maybe get more shorts even lower.
i think its time to port the heads... i can def. understand why you didnt take the heads off, but after all the porting you did you left the most restrictive parts of the air stream untouched! that is the bowl and throat area of the cylinder head right behind the intake valve head. you're trying to cram more air through the same size holes as before!

from my understanding, not saying it did hurt anything, but all the port work and gasket matching has actually done is slowed the velocity of the air charge pre-cylinder head since it is still restricted in the cylinder head. hope that make sense:), not trying to bash work or anything, your car screams for a stocker:)
 
Jan 30, 2004
630
18
18
Boca Raton, FL
Well I finally did it. Went to a track rental today in Bradenton, FL and finally clicked off an 11 second time slip. Nothing has changed with the car other then continual tuning with the Maf Pro. Here is the slip below:

60' 1.620
330' 4.865
660' 7.613
MPH 89.84
1000' 9.967
1/4 11.961
MPH - 112.83

This was the best 60' and MPH to date also. I had the boost set to 25 psi, timing was 24/22, and the A/F was around 11.2:1.

Not sure how much I gained from the port and polish, but the best the car has gone before 12.17 @ 110, so I picked up 2 tenths and 2 mph. Best short before was 1.65.
 
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