LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

All this talk of 1.7RR's, have a couple ?'s

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Old Oct 16, 2003 | 06:12 PM
  #16  
94formulabz's Avatar
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What was your weight?

If only i could pull a 1.53.........


-brent
Old Oct 16, 2003 | 07:17 PM
  #17  
kmook's Avatar
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Originally posted by SAR2K
111.50
Hey Steve, dont take this the wrong way im just trying to figure this out. But isnt 112mph in the 1/4 a little err high? I mean i had almost 400rwhp and ran 115, my buddy has 400rwhp also and ran 116. So that would mean you had around 350rwhp with a stock LT1 and bolt ons? What do you consider bolt on? Maybe im missing something here...
Old Oct 16, 2003 | 08:16 PM
  #18  
SVT Killer LV's Avatar
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my bottle has some bolts....
my cam has bolts...
Old Oct 16, 2003 | 09:47 PM
  #19  
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Thumbs up

Ken no offense taken man, I've been down this road before, LOL. I can assure you the only thing stretching the limits of "Bolt-On" was the 1.7 rockers. There are quite a few folks on here that can vouch for me.
I'll e-mail you tomorrow on the whole set up as I don't want to hijack this thread.
Steve...
Old Oct 17, 2003 | 07:19 AM
  #20  
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Those scorpion RR's say they are Self Aligning. Is this true? Then why use guideplates. Can you still use GP's with self aligning rr's?
Old Oct 17, 2003 | 08:05 AM
  #21  
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Oh boy here it goes again.

Just to vouch for Steve, he is a stand up guy and what he said is true. All he had was the 1.7RR's, to many people seen his motor and his setup.
Old Oct 17, 2003 | 08:37 AM
  #22  
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SAR2K or anyone else, can you answer these 2 questions? Thanks!

2. Would this allow the engine to rev higher, allowing higher shift points?

3. Would I benefit from a custom tune for the increased lift?
Old Oct 17, 2003 | 11:17 AM
  #23  
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Whiteboy,

Yes it will rev higher. You will need to replace the valvesprings to use 1.7s and that will allow you to rev higher.

Yes, IMO you benefit from a custom tune on a stock car. Granted its only a couple HP, but its still a good value/bang for the buck.

Sar2k,
What was your weight?

Realquick.
There is no reason to use GP with SA rockers. It will work but you also could run into trouble. Many people recommend against it because of the possiblity of bind. If the SA guides on the tip have a smaller range than the guideplates than the pushrods will never even contact the guidplates or vice versa. The 2ndary alignment would be extra or redundant. However, if the guideplates are not aligned right it could cause binding which would not be good. I can tell you from experience that i ran guideplates with SA rockers for about 75 miles or so. Why? because comp packaged 15 SA and 1 nonSA rocker together! I then added the guideplates to 3 cylinders in and ran it for a couple days till i got the set of nonSA and added the rest of the guideplates and installed them. There was no abnormal wear on the guideplates or rocker tips indicating bind when compares to the rockers with SA tips and no guideplates. Like i said though there is no reason to have both and if the guidplate isn't aligned right it could bind so you want to avoid that.
Old Oct 17, 2003 | 11:20 AM
  #24  
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Thanks 94formulabz! That's what I needed to know!

Jeff
Old Oct 17, 2003 | 11:28 AM
  #25  
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Originally posted by 94formulabz


Realquick.
There is no reason to use GP with SA rockers. It will work but you also could run into trouble. Many people recommend against it because of the possiblity of bind. If the SA guides on the tip have a smaller range than the guideplates than the pushrods will never even contact the guidplates or vice versa. The 2ndary alignment would be extra or redundant. However, if the guideplates are not aligned right it could cause binding which would not be good. I can tell you from experience that i ran guideplates with SA rockers for about 75 miles or so. Why? because comp packaged 15 SA and 1 nonSA rocker together! I then added the guideplates to 3 cylinders in and ran it for a couple days till i got the set of nonSA and added the rest of the guideplates and installed them. There was no abnormal wear on the guideplates or rocker tips indicating bind when compares to the rockers with SA tips and no guideplates. Like i said though there is no reason to have both and if the guidplate isn't aligned right it could bind so you want to avoid that.
Yeah, I figured as much. The reason I asked is beacuse it says SA for the rocker arm section on their site. I called though, and the 1.7RR's are NSA., so I can use guideplates How's the car running?
Old Oct 17, 2003 | 11:37 AM
  #26  
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Originally posted by RealQuick
I called though, and the 1.7RR's are NSA., so I can use guideplates How's the car running?
Good, glad that worked out.

It's not already in the garage for the winter It flurried last week here although its not that cold now. I have heard rumors that my little brother has been practicing driving stick in our driveway! hahahaha. Thats ok though since he was the one who cleaned it up for me when my gf took it home.
Old Oct 17, 2003 | 09:44 PM
  #27  
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Originally posted by SAR2K
I installed 1.7's last year on my TA with EXCELLENT results. There is NO turbulance issue created with 1.7's and stock heads. The lift produced just is nowhere near high enough for that to happen. Yes it will increase the power band, my bolt-on combo pulled to 6300 after the rockers.
Hell 11.94 out of a Bolt-On LT1 ain't bad.
The only issue you will have is valvetrain geometery. You must use GM Bow Tie guide plates for a good set up. I can't remember the PN for these guide plates, but Matt might. Also I'd reccommend the Isky stock replacement springs as they are good to .550 lift.
I understand that Comp Cams now has a 1.7 rocker. I had dinner a few weeks back with Chris from Comp Cams and he was giving me a hard time for using Crane rockers on my car and told me about the Comp rockers, LOL... all in fun.
Anyway go with the 1.7's you wil not be disapointed.
Give the folks at Thunder a call as I believe they can set you up with the Comp 1.7's and all required components.
Good luck guys!
Steve...


Yes i do have the part number as well as all the part numbers for everything i used for the swap in the thread i started about my install.....Thanks again for the springs steve!!!
Old Oct 17, 2003 | 09:49 PM
  #28  
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for all you guys that have doubts about the power these add....

I wish you all lived in my area so i could take you all for a shakedown run....i bet even with my slippin trans you will be pleased with my 90,000 original cats slippin trans TA. hell it feels like a different car to me and ive owned it for four years now. i cant wait to see how she really goes when the new trans and convertor gets done in the spring.... without the bald nittos too LOL
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