Just wondering what you guys still running a stock cam shift at in a race?

 

2000

 

Ahhh....never....unless you have your TPI engine in a truck and need the torque.

Seriously, get a newer cam design with similar specs to make better torque even then. The factory designs are really old compared to the designs out now.

Don't keep the stock cam...unless the racing class you are in requires you to.

 

I am still running a stock cam because my engine is under warranty untill aug. (crate motor). Definately NOT by choice. I just want to know everyone's shift points, because I hear a lot of people on the board talking about going up to 6000 on a stock cam!!!

 

DP

 

I still have an auto in my 87 5.7 and I shift at around 4600 on the 1-2 and 4400 on the 2-3.[stock cam]

 

my best imes at the track were made with my peanut camed 305 tpi trans am
wre made 1-2 and 5200 and 2-3 at 5200
but i also have a 2400 converter ,and all the other mods listed below

 

Just for the record, I have a 305 TPI firebird formula, and is seems to LOVE 4800-5000, it is bone stock from what I know and It is a Mustang EATER I try to shift 1-2 at about 5900 and 2-3 at about 5000, for those of you who have stock 305's they can be pretty pi&&y at 5500 rpm wanting to float vavles...NOT GOOD!!!

Jhnboy9

 

not 5900 d@mnit 4900

 

The cams not the prob, as said here numerous times the intake is the real bottlneck in the system.with ported stock intake ,simese runners ,mine still like to be shifted at around 4900 .

 

It's a combination of both....the intake restricts the ability to go higher RPMs (not enough air getting it), but if you were to take care of the intake, it still wouldn't help much because the cam wouldn't produce power in the upper RPMs.....that wasn't the intention of my question. I wasn't asking about MAX RPMS....i was just asking what everyone shifts at. I asked only people w/ a stock cam because it doesn't matter to me much what some guy w/ AFRs and a HOT cam shifts at, because I can't duplicate that w/ my stock cam.

 

stock peanut cam, I let the tranny shift at 4600 rpm.

 

redline for TPI cars is 5500, so i wouldnt shift beyond that (hello valve float). stock, our cars make peak power at about 4800, and in my Vette i put the shifter in D (3rd) and the tranny shifts right at 4800 rpms on every shift. ive gotten my best times this way. if i try to manually shift it at a higher rpm, my times get worse. until i siamese my intake base, 4800 is the way to go

 

It is rare that an automatic tranny will shift at the optimum shift point. I have found on my stock 305 that shifting at 4800 (you have to manually shift) produces the best results.

There is no absolute answer for you, as every engine/combo is different. Your engine may want to shift at different rpm. You need to try several runs at different shift rpms and then select the one that gives you the quickest ET.

Even with my new motor, I run quicker if I shift at 4900-5000 and not higher. An adjustable shift light is great for helping you become consistent. (keeps you from having to watch the tach too!)

The key to shifting is not to see how high you can get your motor to rev, it is to keep your engine in highest area of the torque/hp curve. Other than trying different rpm runs at a track, the only other way you can know where your optimum shift point is, is to dyno the car.

 

when i had my L98 i used to shift at around 4800-5000

now i'm shifting at around 5000-5200, not much of a difference in shift points

 

I've run my best shifting manually at 4900. I did not start this thread to find out the highest RPM I can shift at....just curiosity as to what everyone else is shifting at. Whenever someone asks a question, does everyone automatically assume they dont know anything? No offense...but you're the second person to come in and try to "educate" me...when I didn't ask a question that requires an explaination. I understand that you're just trying to help, and I appreciate it...but when you give me the answer to something simple...it makes me look like I dont know anything, so when I go in another thread and answer someone's question on a complicated question, they think "he doesn't know what he's talkin about....he didn't even know...." And then you telling me that "there is no absolute answer for you, every engine/combo is different" I know that.....once again...that's not why i started this thread. If I ask what custom chip everyone is running..that doesn't mean that i'm asking so that I can run out and get the same chip burned for my car. I'm sorry about this...this is not aimed at you, i'm not taking out on you....but I just had to get this out in the open and happened to do it in this post.

 

Is that TPI camaros too...or is that vettes? I'm not sure because my car originally had an LO3 (tbi) and the redline on the tach is 5,000.