what kinda heads are those?

 

Check the sig...ported LT4's...

 

sorry i missed that....
jesse

 

They are suppose to be back cut. But I am skeptical as well after seeing the numbers. My friend says you can look up through the port and tell. Is this true? If not geuss im gonna have to pull them back apart.

I appreciate all your comments. Taking notes on them all. If I can get ahold of my friend and get his flow numbers on his IRS heads I will post them. He made 403 and 413 on those heads which are similar to mine. I will let you guys be the judge once I get his numbers on them. He has some GTP's this year. And they considerably out flowed the others.

Thanks,
Mike

 

Here are the numbers on his IRS heads he sold these for 1,000 dollars on here BTW. If the guy that bought these has them on his and ya read this post how your car is doing.

Anyways back to regular scheduled program. Here is what they Flowed:

Intake -------- Exhaust ----- Intake --- Exhaust
100-- 71.59 --- - 41.34 --- 100 75.11 --- 46.08
200-- 133.36 -- 106.31 --- 200 129.01 --- 99.84
300-- 184.05 -- 145.61 --- 300 180.23 --- 137.28
400-- 226.48 -- 174.51 --- 400 226.03 --- 147.03
500-- 259.33 -- 184.94 --- 500 258.60 --- 171.60
600-- 254.90 -- 193.94 --- 600 269.04 --- 189.20

Those are his numbers on the left side and mine on the right for quick reference. Like i said Ruffidlnz made like 403 and 413 RWHP and RWT with the heads flowing what they did on the left. Remember as well Same pistons same block. only difference between these setups is the heads and im running a stronger crank. I have talked to Chuck today he is gonna work on them some more for me. Is there really anything left to get out of them. I noticed the exhaust side is a little low. Does that affect my horsepower much? I am really open to suggestions here. Only want to do this once.

Thanks,
Mike

 

chad-
either the low lift numbers aren't good, or those numbers are a crock. first of all, 285 on the exhaust is almost impossible even with a pipe. 290intake is believable... but if you crunch the numbers, your car should make a LOT more than 438rwhp!

427ci, with a 290cfm head even with a smallish hyd cam should make 450+.

 

my flow numbers below .450 lift SUCK, i have the flowbench sheet @ home, will post exact numbers tonight

 

Any track times with that set-up chad?

Mike

 

Jordon,

I admire your opionion. Though I dont have many post I have been a lurker for years. I have followed many of your builds. They have all been impressive. Glenn (Ruffidlnz) I believe has actually bought some pistons off you at one time. If there is any advice you could give I would greatly appreciate it.

Thanks,
Mike

 

Sorry but I don't belive 280 on the exhaust either, then again there are so many way to flow, maybe they used a FLOW DATA bench which spits out crazy exhaust numbers & a pipe, maybe thats how they got those numbers, I think TEA does that & their LT1's flow like 250CFM on the exhaust, but I think the best way to flow is without a pipe & using a super flow bench 300,600.

Matt.

 

Here are my new numbers. He worked them a little more. Especially on the exhaust side. This is what im bolting on this week.

.100 75.11 /74.00
.200 129.01/137.00
.300 180.23/189.00
.400 226.03/227.00
.500 258.60/256.00
.600 269.04/269.00


.100 46.08/45.00
.200 99.84/110.00
.300 137.28/142.00
.400 147.02/179.00
.500 171.60/190.00
.600 189.20/196.00


first group listed are my before and after intake. @nd set are my before and after exhaust.

Mike