Forced Induction and the LT-1
03-23-2009, 09:06 PM
#31
Moderator
Join Date: Dec 1969
Location: Buffalo, New York
Posts: 10,745
Hello all,
I just saw the thread and had to post....
I have a 1995 pontiac formula 355 ci with a ati p600b.
I just wanted to thank all of the members on the forum.
Rskrause has been a huge help so thank you...
My car has taken me years to get it slowly to where it is now. A link below to youtube....
http://www.youtube.com/results?searc...pig+p600b&aq=f
The person posting is PAC1085, if the link doesn't work search The Pig P600b on youtube...
I may eventually want to get some info on what gains id get with a better set of heads. The castings are stock..other than the upgraded parts....
I have a dyno sheet if anyone is curious about what it put down.....I may need to update the sig..in that the exhaust is now a pacesetter set of headers 1 3/4 primaries no cats...to a slp loudmouth exhaust.
Again, thanks for all the help with my car...woudn't of gotten anywhere near this on my own heh
Steve
I just saw the thread and had to post....
I have a 1995 pontiac formula 355 ci with a ati p600b.
I just wanted to thank all of the members on the forum.
Rskrause has been a huge help so thank you...
My car has taken me years to get it slowly to where it is now. A link below to youtube....
http://www.youtube.com/results?searc...pig+p600b&aq=f
The person posting is PAC1085, if the link doesn't work search The Pig P600b on youtube...
I may eventually want to get some info on what gains id get with a better set of heads. The castings are stock..other than the upgraded parts....
I have a dyno sheet if anyone is curious about what it put down.....I may need to update the sig..in that the exhaust is now a pacesetter set of headers 1 3/4 primaries no cats...to a slp loudmouth exhaust.
Again, thanks for all the help with my car...woudn't of gotten anywhere near this on my own heh
Steve
Rich
06-06-2009, 01:36 AM
#33
Moderator
Join Date: Dec 1969
Location: Buffalo, New York
Posts: 10,745
Rich
Last edited by rskrause; 06-06-2009 at 01:39 AM.
08-09-2010, 10:52 AM
#36
Registered User
Join Date: Apr 2005
Location: Denton/Rockwall, TX
Posts: 2,146
Stock crank, splayed 4 bolt mains, forged H-beam rods, and a nice set of Diamond pistons. Should this be good for 12-15 psi and 600-650 HP at max boost? Heads will most likely be ported trickflows, and I will be aiming for a CR of around 9:1. I am wanting to build a motor that will last a long time, will not be a daily driver, but will see boost often when it is driven. Should I shoot for a forged crank also, or stick with the stock crank?
Edit: The motor will be a 355.
Edit: The motor will be a 355.
08-09-2010, 04:52 PM
#37
Registered User
Join Date: Dec 1999
Location: Upstate New York,USA
Posts: 1,791
If you can swing it, I think the piece of mind factor would be greatly enhanced with the follow thru of a forged crank. You'll have all that expensive hardware slinging around on your 'weakest link'. Your setup is what I have and it's a blast to drive. Runs on everyday 93 octane, no water/meth injection needed. As tame as a honda civic in traffic and an assassin on the freeways/track. 
08-10-2010, 12:20 PM
#38
Registered User
Join Date: Apr 2005
Location: Denton/Rockwall, TX
Posts: 2,146
If you can swing it, I think the piece of mind factor would be greatly enhanced with the follow thru of a forged crank. You'll have all that expensive hardware slinging around on your 'weakest link'. Your setup is what I have and it's a blast to drive. Runs on everyday 93 octane, no water/meth injection needed. As tame as a honda civic in traffic and an assassin on the freeways/track.
Edit: Just clicked on your link and ran across this, "Crankshaft: Balanced Forged SCAT. 3.45" stroke." Appreciate it, oyur site with the parts list is perfect! What kind of track times are you turning with this set-up? Also, how is the turbo lag? Does it spool up rather quickly?
Last edited by 69gto96z; 08-10-2010 at 12:22 PM.
08-10-2010, 06:08 PM
#39
Registered User
Join Date: Dec 1999
Location: Upstate New York,USA
Posts: 1,791
Thanks! Well, I've had all kinds of things(Mostly job related. Contracts in Houston, Alaska and UpstateNY) that kept me from the track to get a good baseline with the 6-speed. I took it out Sept,2009 with the intent to get that baseline but only got to make a half hearted pass. When I went back to the staging area, the clutch went out and I haven't been back. I HOPE to get to the track with the TH350 setup this weekend or the next. It went 108mph in the eighth mile with the 6 speed on that halfhearted run. The motor felt 'funny' after the 1/8th mark so I let off a bit for the rest of the quarter.
UPDATE: I went back to the track a few weeks ago but had a cracked hotside(loss of boost and delay of boost effect) and turned a 129mph quarter mile.
UPDATE: I went back to the track a few weeks ago but had a cracked hotside(loss of boost and delay of boost effect) and turned a 129mph quarter mile.
Appreciate it, and I think you are right. It will be good for the piece of mind. What brand crank are you running? When this build happens, the extra money for the crank won't be an issue hopefully. Assuming I can get a good job out of college with the degree I am getting.
Edit: Just clicked on your link and ran across this, "Crankshaft: Balanced Forged SCAT. 3.45" stroke." Appreciate it, oyur site with the parts list is perfect! What kind of track times are you turning with this set-up? Also, how is the turbo lag? Does it spool up rather quickly?
Edit: Just clicked on your link and ran across this, "Crankshaft: Balanced Forged SCAT. 3.45" stroke." Appreciate it, oyur site with the parts list is perfect! What kind of track times are you turning with this set-up? Also, how is the turbo lag? Does it spool up rather quickly?
Last edited by DirtyDaveW; 07-11-2012 at 03:13 PM.
10-23-2010, 01:28 PM
#40
Registered User
Join Date: Aug 2005
Posts: 112
What about external upgrades on the engine as the boost rises? I mean PCV system, passenger side valve cover vent pipe, vacuum lines, blowby control, excessive crankcase pressure, oil catch can...
Little is needed at 5-6 psi, but at 8 psi? 12 psi? 15 psi? Beyond?
I understand 5-6 psi system is not worth it, it is better off staying with head/cam upgrade for less. So what is the most practical boost level for money spent reliability/power wise before it gets prohibitely expensive?
Little is needed at 5-6 psi, but at 8 psi? 12 psi? 15 psi? Beyond?
I understand 5-6 psi system is not worth it, it is better off staying with head/cam upgrade for less. So what is the most practical boost level for money spent reliability/power wise before it gets prohibitely expensive?
10-23-2010, 01:39 PM
#41
Registered User
Join Date: Dec 1999
Location: Upstate New York,USA
Posts: 1,791
With the right tune, you can get away with murder on a stock motor.
Case in point...
http://www.gmhightechperformance.com...tercooler.html
Case in point...
http://www.gmhightechperformance.com...tercooler.html
What about external upgrades on the engine as the boost rises? I mean PCV system, passenger side valve cover vent pipe, vacuum lines, blowby control, excessive crankcase pressure, oil catch can...
Little is needed at 5-6 psi, but at 8 psi? 12 psi? 15 psi? Beyond?
I understand 5-6 psi system is not worth it, it is better off staying with head/cam upgrade for less. So what is the most practical boost level for money spent reliability/power wise before it gets prohibitely expensive?
Little is needed at 5-6 psi, but at 8 psi? 12 psi? 15 psi? Beyond?
I understand 5-6 psi system is not worth it, it is better off staying with head/cam upgrade for less. So what is the most practical boost level for money spent reliability/power wise before it gets prohibitely expensive?
10-25-2010, 11:36 AM
#42
Registered User
Join Date: Aug 2005
Posts: 112
That doesn't really answer my questions... I wanted to know what needs to be addressed on a supercharged LT1 in daily driver to be reliable other than the engine internals at different boost levels...(vacuum hoses, pcv, breather, many more things I don't know of yet...) All to figure the most practical limit in power vs money invested and reliability. I want something trouble free, without leaks, blowby, stalling and I want to be sure I'll get where I want to go with the car without worries of a breakdown...
12-08-2010, 05:54 AM
#45
Registered User
Join Date: Dec 1999
Location: Upstate New York,USA
Posts: 1,791
Re: Forced Induction and the LT-1
I have the stock ignition on my 96 and it works fine all the way to 6,500 RPM on my 14 psi setup. I use Autolite racing plugs gapped at .032 in my Canfield heads.