I dont know what the stage one heads from combination motorsports are supposed to flow but racenet claimed that theirs flowed 270/210 (stage 2). The stage 2 from cm is prolly a lot bigger/better than that but it's also an extra 650-thats a TC. I dont want to buy crap but i dont want to pay more than i have to either. I'll call up CM tomorrow and see what those stage 1's flow. If they flow the same, I'll prolly just go with them. Otherwise I might go for the racenet's... Anyone know what they claim to flow???

One thing I love: called up racenet asking about a supercharger and they said "You WILL have to rebuild your bottom end." I love that. As if just bolting on a supercharger is gonna destroy the engine instantly. I know it's not exactly good but lots of ppl run much higher than 4.5-6 psi and get a lot of life out of them. Granted I have 80k miles and it's a daily driver-rarely taken a WOT- but i still think i would be ok charging for a couple years (only put on at most 100 miles/week).

Thanks yo.

 

Just ask them what would be the most efficient setup that goes with you cam and the rest of your performance parts. Some people claim that cfm's aren't exactly better bigger...it's what goes best with the whole outfit.

 

I thought GTP ported their heads?

 

My heads are a Combination Motorsports Stage 2 LT4's. I don't have the flow sheet in front of me, but they were in the low 300's. It's actually kind of funny though, getting flow numbers from them is almost like pulling teeth. Let's see if I can remember exactly how Seth put it....

"Flow number's? Well, let's just that we've flowed "the best" heads on the same bench, back to back with our heads, and ours laid the smack down on them. Agostino, GTP, MTI...bring them on. Horsepower and 1/4 mile times are what count, go and tell your buddy that your 13 second car's heads flow 400cfm and see how impressed he his. If you're not satisfied with our heads, send them back."

I was cracking up, that guy kills me. But, you see who's heads I ended up with. He went on to explain that they don't want to get caught up in the "flow bench war" that's been going on lately, with all these companies claiming huge flow numbers out of their heads.

They have a satisfaction guarantee thing, where they will let you return the heads if you are not happy with them. Ask Racenet what their return policy is on heads. LOL!!!

 

Stay the **** away from racenet, they are a bunch of crooks. Carlos rodriguez or whatever his name is... *****. Why isn't their company gone yet? Not only did they **** me around, everybody who I know that has done business with them got dicked around.

You want some good heads. Try combination motorsports. Or try Phil AKA skarodom at www.advancedinduction.com, he has some very nice heads, and very nice dyno numbers.

 

Yeah, I bought those heads a from RUFFIDLNZ a week ago, and will be installing them with my cam this weekend...I'll let you know how they run... BTW, I've never had a problem with racenet.net either. I've ordered my entire valvetrain (minus cam) through them a year ago, among other parts in the past. I haven't dealt with them since last year, but I've never personally had a problem with them...

 

he told me the same thing. I'm going with LT1 castings, but same deal. Look at any of the "top dogs" No one publishes flow numbers. When my friend told me he was only expectign 260cfm from my heads i was about ready to cry. Then he was like "well i can just flow them the way everyone else advertises and get you 280cfm and i can get you all kinds of worthless top end flow numbers but thats irrellivant. "

 

And many people run higher boost and gernade their motors in no time. They were doing you a favor and telling you you will need to prepare for a rebuild just in case... in using forced induction on a stock LT1.

Flow numbers really are not the best way to determine a good port job. I agree, velcoity and port volume make a big difference also. My friend had his LT1 heads ported locally. It only flowed @ 28 inches .500 260 cfm.. But that was with 185cc's He dynoed 25RWHP more than a very similiar setup at the dyno that week. Almost identical setup as the other guy, but the heads were ported by two different people..Other guy had higher flow numbers, but it did not help him make more h.p.

I had good dealings with Racenet.net IRS. But liek mentioned earlier , it seems some people didn't

 

http://www.cmotorsports.com

702-798-8504

Joe

 

Two companies ill never do business with- ARE and IRS(racenet).

 

I was discussing head options with bret (sstrokerace- aka Advanced Tech Guru)

Take it for what its worth. I know i am.

 

Don't forget about Excessive Motorsports. I ordered some stuff from them and over a month later I find out they backordered something. Common courtesy would have been to tell me when I ordered it...not let me bitch and complain and then find out. Alot of people had problems with them.

Joe

 

The combination motorsports heads sound better and about the same price. I was looking at the ls1 stage one heads accidentally. The lt1 stage 2 heads are only $45 more and another $150 if i want a port matched intake. So i'll prolly order them on Monday. They said that it would be about 3 wks for me to get them which sux but is not THAT long. I guess I could do a TC or rear suspension in that time pretty easily.

 

well, don't know about the heads but expect a good 6 months to get them

 

6 months to get them from whom? I didn't ask racenet but CM said 3 weeks.