Search found 39 matches

by gran turismo
Wed Oct 03, 2012 3:09 pm
Forum: Engine
Topic: Adding Material To The Inlet Ports????
Replies: 6
Views: 2426

Re: Adding Material To The Inlet Ports????

I did it to the inlet ports on my 12v 3L. I used devcon titanium putty (recommended by Devcon). I haven't run the motor yet though, been busy on other stuff. I'll let you know how it works out though (Richard Jemison told me it is a bad idea and I should "remove that plastic"!).

Jeff
by gran turismo
Mon Nov 28, 2011 9:25 pm
Forum: Performance
Topic: 3 liter, 24 valve engine project
Replies: 405
Views: 152995

Re: 3 liter, 24 valve engine project

Michael, Chemical welding (JB Weld or some other metalized epoxy) or low temperature braising (Alumiweld from Harbor Freight but made in USA...) would probably work. I am currently braising together an enlarged intake for my GTV6 but it is tricky and it takes alot of heat. However I guarantee there ...
by gran turismo
Tue Mar 22, 2011 3:50 pm
Forum: Exhaust System
Topic: Secondary Pipe Tuning???
Replies: 20
Views: 6899

Re: Secondary Pipe Tuning???

Pipemax also outputs stepped primary tube specs. A smaller dia tube is used for the upper half and a larger diameter for the lower half of the primary tubes. I am thinking about using the upprt halves of my old shankle headers as-is (with the 1.38" OD tubes) but with a new lower part (below the flan...
by gran turismo
Tue Feb 08, 2011 1:08 pm
Forum: Performance
Topic: JK 24v 3liter ..at last!
Replies: 197
Views: 47159

Re: JK 24v 3liter ..at last!

Jim, There is some interesting info about the stock plenum here: http://www.alfabb.com/bb/forums/engine-management/172769-v6-indiuction.html This indicates that with the stock plenum there is poor air distribution at high rpm (with a modded 12V). It will be interesting to see how your modified plenu...
by gran turismo
Wed Feb 02, 2011 9:26 am
Forum: Performance
Topic: 3 liter, 24 valve engine project
Replies: 405
Views: 152995

Re: 3 liter, 24 valve engine project

I would need a cam reference sensor (and maybe Megasquirt III?) to go true coil-on-plug but I think I could fire 2 coils simultaneously in the same (3 ignition channel) wasted spark configuration as I have now without issue. According to the DIYautotune tech support (who I bought mine from) the MS2...
by gran turismo
Tue Feb 01, 2011 3:27 pm
Forum: Exhaust System
Topic: Shankle Exhaust Secondary (Header?) Collector 3 pipes to 1
Replies: 2
Views: 3543

Re: Shankle Exhaust Secondary (Header?) Collector 3 pipes to 1

You could have the hole welded up, if necessary a patch could be welded to it. If the copper gasket is not torn then you could anneal it (heat it with a propane torch to soften it up) and just re-use it.

Jeff
by gran turismo
Tue Dec 21, 2010 5:47 pm
Forum: Performance
Topic: JK's v6 book
Replies: 266
Views: 66447

Re: JK's v6 book

Jim, I was curious about the Cat Cams 1030321 and 22 so I plotted them in excel using the data on the catacams website. They give you lift at 0.1 mm, 1 mm, lift at tdc and peak lift. I had to add a data point with a faked duration at about 9 mm (0.35") lift to get the profiles to look right. I also ...
by gran turismo
Mon Dec 13, 2010 11:20 am
Forum: Engine
Topic: worn cam, clatter
Replies: 42
Views: 12816

Re: worn cam, clatter

I would not try to crank the motor with the cam out. If the pulley comes off then you will bend the valves on the other bank. I think a better way to do it would be to remove the timing belt, take off the dist. cap, rotor, and dust cap and turn the oil pump with a drill motor chucked up to the dist....
by gran turismo
Fri Dec 10, 2010 1:57 pm
Forum: Performance
Topic: JK's v6 book
Replies: 266
Views: 66447

Re: JK's v6 book

Jim,

That's great news about your book. Thanks for all of the hard work!

Aren't you using motronic? Do you think the idle instability has anything to do with the flapper syle AFM?

If so maybe one of those aftermarket hot wire AFM's would help.

Jeff
by gran turismo
Mon Oct 25, 2010 4:48 pm
Forum: Performance
Topic: Milano Twin Turbo
Replies: 24
Views: 8249

Re: Milano Twin Turbo

Greg, I did a quick pressure drop calc with a compressible flow program..... I based the calc on 100%VE at boost pressure, 7000 rpm, 204 F turbo outlet temp, 140 F intercooler outlet temp, 1 psi drop across intercooler, 10 psi at the throttle body, estimated pipe lengths, fittings. I used 2" tubing ...
by gran turismo
Fri Oct 22, 2010 11:01 pm
Forum: Performance
Topic: Milano Twin Turbo
Replies: 24
Views: 8249

Re: Milano Twin Turbo

Greg, That really is a nice job! It looks like it was a pain to route that passenger side compressor outlet pipe over and merge it with the drivers side pipe at the intercooler inlet. That longer pipe with bends will produce more pressure loss, take longer to compress, and the passenger side turbo w...
by gran turismo
Thu Oct 21, 2010 11:30 am
Forum: Performance
Topic: 4-cylinder turbo performance
Replies: 393
Views: 80605

Re: 4-cylinder turbo performance

It would be easier to see if the hall is working if you can slowly crank the engine by hand since it produces a voltage signal twice per crank rev.
by gran turismo
Tue Oct 12, 2010 1:49 pm
Forum: Engine
Topic: Rods - 3.2 vs 3.0 vs 2.5
Replies: 7
Views: 1922

Re: Rods - 3.2 vs 3.0 vs 2.5

My 164 rods (91') have the oil squirt hole.
by gran turismo
Thu Oct 07, 2010 8:50 am
Forum: Engine
Topic: Aluminum fly
Replies: 12
Views: 4346

Re: Aluminum fly

My machinist first determined the imbalance on his dynamic balancing machine. Then the flywheel was lightened. He then put it back on the dynamic balancing machine and drilled holes to match the imbalance before removing material (you can kind of see them in the pic). In order to get the machinist t...