12a CarTech drawthrough HELP!!
02-13-09, 11:40 PM
#126
DOWNPIPE...... hmmmm
I was hoping for some insight on my downpipe. I kinda just pieced something together to get it running with parts I had laying around. It bends at a 90* right out the turbo with a 2.25" pipe than another 90* bend with 2" I think into my 2.25" exhaust (all free flowing mufflers... no cat(s)).
I'm I really loosing much with my $#itty downpipe?
I was thinking of putting together a 2.25" downpipe with mandrel bends (compression bends now) to connect into my exhaust.
Any input on this?
I'm I really loosing much with my $#itty downpipe?
I was thinking of putting together a 2.25" downpipe with mandrel bends (compression bends now) to connect into my exhaust.
Any input on this?
02-14-09, 12:45 PM
#127
Old but fast
iTrader: (2)
Join Date: Sep 2008
Location: McMinnville,OR
Posts: 45
Likes: 0
Received 0 Likes
on
0 Posts
thnx 4 help
u have all ben a big help, im learning as mutch about using computer as wut make a rotary tic. im an old "computer erlitrerate" giezer. my kids & wife usly haftu help me but m geting more independent @ IT, MY SPELING mite even get beter. am going to search out these books rite away thnx again. 
02-15-09, 04:31 PM
#131
Well, I've got an intermediate magnaflow muffler
http://store.summitracing.com/partde...rsview=sku&Ns=
located about under the passanger seat, I'm thinking I will run a 3" downpipe to it and leaving my 2.25" behind the intermediate muffler to my tail muffler.... similar to this:
http://store.summitracing.com/partde...5&autoview=sku
What you guys think? Enough flow?
http://store.summitracing.com/partde...rsview=sku&Ns=
located about under the passanger seat, I'm thinking I will run a 3" downpipe to it and leaving my 2.25" behind the intermediate muffler to my tail muffler.... similar to this:
http://store.summitracing.com/partde...5&autoview=sku
What you guys think? Enough flow?
02-15-09, 10:30 PM
#134
OK...
Starting to piece together a 3" system in my head. I will need 2 x 90* bends (or a 180* bend cut and re-welded) at the downpipe, a 45* at the axle, a 90* on top of the axle, a 45* after the axle, some union connectors for easy mating for welding and a bunch of straight pipe. I have a Magnaflow muffler now and really dont want to buy another one http://www.magnaflow.com/02product/d...rtnumber=14813
The core on this is 2.5" and I was thinking of using a reducer at the muffler.. ideas? Gah...
180* bend for downpipe $24.95
http://store.summitracing.com/partde...5&autoview=sku
90* bend 6" radius - one cut in half on each side of axle $24.99
http://store.summitracing.com/partde...5&autoview=sku
90* bend 3" radius for over the axle $27.99
http://store.summitracing.com/partde...5&autoview=sku
2 x 4' straight piece of pipe $30
http://store.summitracing.com/partde...5&autoview=sku
Bunch of unions ~$20
Total = $128 + handling..... DAMNIT
ORRRRR.. just found this http://store.racing-solutions.org/3on4rasuexbu.html
would almost cut cost in half
Starting to piece together a 3" system in my head. I will need 2 x 90* bends (or a 180* bend cut and re-welded) at the downpipe, a 45* at the axle, a 90* on top of the axle, a 45* after the axle, some union connectors for easy mating for welding and a bunch of straight pipe. I have a Magnaflow muffler now and really dont want to buy another one http://www.magnaflow.com/02product/d...rtnumber=14813
The core on this is 2.5" and I was thinking of using a reducer at the muffler.. ideas? Gah...
180* bend for downpipe $24.95
http://store.summitracing.com/partde...5&autoview=sku
90* bend 6" radius - one cut in half on each side of axle $24.99
http://store.summitracing.com/partde...5&autoview=sku
90* bend 3" radius for over the axle $27.99
http://store.summitracing.com/partde...5&autoview=sku
2 x 4' straight piece of pipe $30
http://store.summitracing.com/partde...5&autoview=sku
Bunch of unions ~$20
Total = $128 + handling..... DAMNIT
ORRRRR.. just found this http://store.racing-solutions.org/3on4rasuexbu.html
would almost cut cost in half
02-16-09, 10:17 PM
#136
The next step
As $$ hasn't started growing on trees yet... my exhaust rebuild will need to wait until the 1st of the month at least.
Ugh... My wife is a little dissappointed in me... LOL
This "budget" turbo build has almost doubled the original "estimate"... But, damn its fun to drive. It pulls like a sun-of-a
I figure I only have FOUR areas for UPGRADE:
1: Exhaust -> upgrading to 3" from turbo back... will swap in my GSL rear end when I swap exhaust.
2: Timing -> currently locked at 10* Leading / 0* Trailing.. This seems to be the "safe" tune but curious if more HP could be found SAFELY with some more timing
3: Ignition -> Still running stock ignition with aftermarket plug wires... I'm thinking aftermarket coils would be a benifit
4: Spark plugs -> I'm currently using NGK BR8EQ-14 all around... I'm a little curious if different spark plugs would be better now that I'm running 10 psi
Any INPUT on this? Especially plug choice.
Ugh... My wife is a little dissappointed in me... LOL
This "budget" turbo build has almost doubled the original "estimate"... But, damn its fun to drive. It pulls like a sun-of-a
I figure I only have FOUR areas for UPGRADE:
1: Exhaust -> upgrading to 3" from turbo back... will swap in my GSL rear end when I swap exhaust.
2: Timing -> currently locked at 10* Leading / 0* Trailing.. This seems to be the "safe" tune but curious if more HP could be found SAFELY with some more timing
3: Ignition -> Still running stock ignition with aftermarket plug wires... I'm thinking aftermarket coils would be a benifit
4: Spark plugs -> I'm currently using NGK BR8EQ-14 all around... I'm a little curious if different spark plugs would be better now that I'm running 10 psi
Any INPUT on this? Especially plug choice.
02-17-09, 10:23 AM
#137
7less for now!
Join Date: Oct 2007
Location: eau claire
Posts: 1,372
Likes: 0
Received 0 Likes
on
0 Posts
b9s on the plugs or b9es. They are motorcycle plugs. Gap them down tight 15-20 thousandths. Gslse-addicts tt bix would help you out as well. Leave your timing be. DOnt listen to others who who have the extra 20hp and walk the line of danger. If you play with the timing ask yourself before you do, can i afford a rebuild if so do it.
With the plugs you are gonna need a thin wall 13/16ths socket
With the plugs you are gonna need a thin wall 13/16ths socket
02-17-09, 11:23 AM
#138
I need a new user title
Join Date: Oct 2005
Location: Yaizu, Japan
Posts: 2,646
Likes: 0
Received 0 Likes
on
0 Posts
With a 10 degree split and premium gas, you could probably get away with another degree or two of timing, but I'd leave it alone if the idea of a rebuild scares you. 
You could try reducing the split if you want.
You could try reducing the split if you want.
02-24-09, 09:41 AM
#147
So.. is it normal for the carb to load up after idling for a while? Or is it pooling of fuel in the turbo?
When the car idles for several minutes and I give it gas it goes VERY rich (pegs my wideband), chokes and coughs and blows black smoke for 1-2 sec. Besides that, runs good.
Actually, taking off in 1st gear tends to over richen the mixture. It will peg out my wideband and cough and spit. I wonder if the accelerator pump squirt is just a bit to much.
When the car idles for several minutes and I give it gas it goes VERY rich (pegs my wideband), chokes and coughs and blows black smoke for 1-2 sec. Besides that, runs good.
Actually, taking off in 1st gear tends to over richen the mixture. It will peg out my wideband and cough and spit. I wonder if the accelerator pump squirt is just a bit to much.
