Thanks I like it better now to.

 

beautiful car and it is running real hard.

I was AMAZED to hear that he had been shifting at 6800 RPM on his stock bottom end with the old cam/heads but he said he had been doing it for a long time and had no problem shifting at that kinda RPM.

I would never 'recommend" someone to twist a stock bottom end (stock rod bolts, etc) that kinda RPM but he is lucky and seems to have a freak bottom end that can handle it for someone reason.

For every person successfully shifting there stock bottom end at 6800 RPm with no problem, there are gonna be 4 or 5 others attemting to do so with out the same results.

Lloyd

 

You're definitely right Lloyd. I guess I've taken this motor to its limit. But with good results nonetheless. Thanks again for a KILLER combo.

 

I just wanted to point that out in case there are others that wanna shove a 240 duration, .660 lift SR cam in there car and shift at 6800 RPM after reading this thread.

For what ever reason, your (BOLO's) engine is able to take this abuse where they will probably not be so lucky at this RPM.

Most agree that 6400-6500 RPM is all you would ever wanna see on a stock bottom end and you are still playing with fire at this point.

If it is your "only car" and daily driver meaning that it would be DEVASTATING if the engine failed, 6300 RPM is what most consider a "safe" limit. Even at this RPM, you "can" have problems but you have better odds of NOT having a problem than if shifting higher compared to a 6500 RPM shift point and MUCH better odss of not having a problem compared to shifting at 6800 RPM.

example - -

shifting at 6300 RPM- 1 out of 20 (5%) people would have a problem and these are probably engines that have seen overheating or skipped oil changes and should not be modded anyway with out a rebuild. Some might have a problem on a "perfectly kept" bottom end but most that have a problem with this RPM would be able to be traced to some "trauma" in its life.

shifting at 6500 RPM- 4/5 out of 20 (20/25%) can have a problem on an average condition stock bottom end.

shifting at 6800 RPM- 15/16 out of 20 (75/80%) can have a problem on an average condition stock bottom end.

These #'s are just my opinion and the #'s may vary 'slightly" if you actually did this test but I would like to show some people not familiar with the GM factory built LT1 stock bottom end (with 80-160K miles), the kind of abuse most feel they "can" or "can't" take.

The car is FLYING and running hard. Working on the 60 ft will get the car in the 10's fo you.

I have recieved with several emails/phone calls about this set up and the info I posted here is the FIRST thing I go over with them when they have a stock bottom end.

"Yes, BOLO is doing this and shifting at that RPM and the stock bottom end may very well live a few more years". I would consider a slightly milder cam, less RPM and/or good rod bolts/rebuild for most people on a stock bottom end.

Lloyd

 

We have seen many cars here at 6500-6800 rpm over the years with 0 issues. The majority were sprayed on top of this

but there is always that note made that it could live a long or short life at these playing levels

We normally work with low mileage well cared for cars. We like to say anything 70K + we prefer not to break the motor open as most do not know the history of the motor, trans etc as they are used and passed on from numerous owner in most cases.

 

awesome setup

 

My car was and ran a 13.77 @ 100, then I put on headers and full exhaust with k&n and with nittos and ran a 13.42@104

 

Years ago, when I was on a really tight racing budget, I used stock bottom ends in my Stocker. I ran some really good numbers and set several IHRA National Records. I also grenaded a couple!

I would highly recomend going through any motor before running it that hard. At a minimum I would balance it, install ARP rod bolts, and replace the bearings and rings. In the long run it's a lot cheaper than picking up the pieces!!

 

haha i know where to go for sure!! i do need some long tubes to start!!!

 

Congrats on the run BOLO! Car is looking good man! Keep up the good work.

 

Wow very impressive results! Car looks absolutely bad ***! I only hope my bottom end and rear last as long as yours have. BTW I need to move out to Illinois seems like there are a ton of LTx guys out there!

 

We love the Lsx motr, but I do try to keep some killer LTx cars running around the Chicagoland area.

Brian email me a parts list when you are ready and I will do my best for you on parts.

 

all this through a 10 bolt... props

 

well kinda... it broke on this last tracking outing after cutting one 1.39 60ft

 

Yea, what a bummer. I'm still wondering what it would've ran with that 1.39.

 

I went 13.9 @ 98 with a bone stock convertible with 120k miles. Intake, catback, tune dropped me to 13.2 @ 106 It can be done!

 

Same here. I went 13.9 @ 101, stock.

 

Nice!!

 

What did it run to the 1/8 when there was a slight problem with it not going into 3rd? Did 2nd gear at least get you to the 1/8 mile?

 

Rick, it went to second, but I aborted before the 1/8--6.86@79.36.