xfi 292
I didn't really like this cam when I had it. I used it with a set of AFR 190's on my 383. Made peak power at 6500 I shifted at 6700. Didn't this guy say those heads made 390rwhp on a buddy's car with a 306 cam? They can't be too bad since that is quite a bit higher than this cam typically makes with stock heads. Probably just needs better valve train to control that huge *** cam. IMO, it's way too big for those heads. You need a smaller cam and better valve train. Post up the dyno when you get your scanner fixed so we can help you.
I didn't really like this cam when I had it. I used it with a set of AFR 190's on my 383. Made peak power at 6500 I shifted at 6700. Didn't this guy say those heads made 390rwhp on a buddy's car with a 306 cam? They can't be too bad since that is quite a bit higher than this cam typically makes with stock heads. Probably just needs better valve train to control that huge *** cam. IMO, it's way too big for those heads. You need a smaller cam and better valve train. Post up the dyno when you get your scanner fixed so we can help you.
In this thread you will see he had questions about his tuners ability, had exhaust leaks, shifted at a low RPM, and had shift lite anomalies that may have resulted in even lower shift points than the 5800 originally posted. Couple these problems with spinning in the first two gears and he had many problems and that gives him a lot of 'free potential'. The cost now is Tunercats and that will put him at this point. "It is what it is!"
The good news is he converted to OBDI and started his car and now has his cable working and last night started collecting data with datamaster. He will buy Tunercats this Friday and then be able to load a tune and make changes to his setup.
I had offered to tune it for him, but with all the people willing to help I bet he will have many people offer to do it and all I am sure will exceed my measly 12 year engine control experience. The contributions of the knowledgeable people here on the forum will shine through and ensure his car runs tip top!
Glad it will all work out.
Thread Starter
Staging Lane
Joined: Feb 2010
Posts: 73
Likes: 0
My heads are setup for a cc 306 but I called comp tech line and told them what springs I have and they said my head setup would work fine with the 292 cam I just had to check pushrod lenth which I did.
those xfi lobes are to much for those crane springs i bet they are cranes 10308-1 you may have to switch to the beehives or the Patriot Gold Extreme springs.. i had the 10308-1 with a xfi280 and upgraded to the golds so you may be having value float depending on how old the springs are...just my .2
TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
look at your cam card while many have offered you solid advice on this thread..changeing to a bee hive spring will most likely be in your future if you want the RPM's that cam requires without float.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
I would honestly look into some beehives.
the XFI cam lobes are similar to LS cam profiles and require "bee hive" springs. Even if a convential single or dual spring has the open and seat pressure of a 918 spring they don't react in the same way as bee hive's do with the XFI grinds.
while many have offered you solid advice on this thread..changeing to a bee hive spring will most likely be in your future if you want the RPM's that cam requires without float.
while many have offered you solid advice on this thread..changeing to a bee hive spring will most likely be in your future if you want the RPM's that cam requires without float.
Beehives work better on LS1 better because they have lighter valves. LT1 valves are heavier and on aggressive lobes, will not be controlled like on an LS1. Not saying beehives dont work on LT1. They just did not work for my cam.
Are you running 1.5 or 1.6 rockers? Those are the springs I run on my 306 set-up, but the ramp rates may be too large on the 292 for those springs. I would switch over to a good set of beehives or some very good dual springs, and go with a custom grind if I was you. The crane 10308 kit is probably under par for that cam.
I would look into beehives also. Not to mention, tunes are not universal they will change with each cam you have.
TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
as noted that cam is not ideal and when set up correctly requires high (7k) RPMs to see max potential.
another cam choice with correct springs set up properly AND a good tune wiould be the best situation.
as mentioned keeping what you have will also work...just need to get valve train up to it and the tune if that in fact needs attention.
11 Second Club
Joined: Jan 2010
Posts: 1,707
Likes: 13
From: New Orleans, LA
yes your tune need to be right...but if Jesus came to your door to tune it and the motor had issues....he would not be able to get it right. you need to address the mechanical issues first than have the tune looked in to.
as noted that cam is not ideal and when set up correctly requires high (7k) RPMs to see max potential.
another cam choice with correct springs set up properly AND a good tune wiould be the best situation.
as mentioned keeping what you have will also work...just need to get valve train up to it and the tune if that in fact needs attention.
as noted that cam is not ideal and when set up correctly requires high (7k) RPMs to see max potential.
another cam choice with correct springs set up properly AND a good tune wiould be the best situation.
as mentioned keeping what you have will also work...just need to get valve train up to it and the tune if that in fact needs attention.
Jesus
