I just got my afr lt4 220's flowed that I bought from Jordan flowed, and the numbers were a little better on the flow bench here in town, then they were on the sheet he gave me. I am trying to get 450 to the wheels with a 396. It will have 11:1, and willl have all bolt on's. Do you think it will be possible with these numbers?
in ex
100 65 47
150 95 74
200 125 97
250 152 117
300 178 131
350 200 149
400 225 155
450 245 178
500 261 181
550 271 197
600 280 204
650 289 210
700 292 215

 

Those heads unported? The numbers look pretty good.. I think you hp goal is very attainable w/ a really nice cam.. I'm sending you a PM to someone that can help ya out w/ that selection..

 

Well I got the heads with the assumption that they were not ported, but after looking at them they have had some port work done to them.

 

Not bad. My TEA LT4's made 288 at .600 with stock LT4 valves and with a medium size hydraulic roller I made the numbers in the sig. Next year a solid is going in...450 shouldnt be a problem at all.

 

I think you can hit 450 with a decent cam.

however, i would be disappointed in those heads, even more disapointed if they have been ported a little. You can get stock lt1 castings to flow in that range.

 

Hey Hoostie,
What do you think of these cam spec's for your setup?

@ 0.050"...

242I 248E 112 LSA 114 ICL (CC lobes)

DD2000 put it at 560 BHP @ 6000 RPM (450 RWHP @ 20% D.T. Loss)

Your flow numbers look good, also.
CT

PS--thank for you help getting my engine in last night!!

 

IMO, That will be pushing the 7k rev limit, thenyou need motec, dfi, FAST etc

I havent ever had the best luck with DD2000, maybe its the user

 

That cam and the 220's in a 396..... I'm guessing more like ~6500rpm for the hp peak if the head port is good.

Should put his shift points well within the 7k limitation.

-Mindgame

 

Mind-
I respect your opinion very highly, but i am just going from what i have seen else where.

I have a friend with max ported (this being the key difference and will move the powerband up) AFR 220s (700 lift being 330 something) 396 and running a 240/250. On the engine dyno it peaked 6700, meaning shift points are right on the ECM limit.

That cam should peak a tad below the one i mentioned, but i was just throwing out the idea as a thought. As I said before, you will be "pushing the 7k limit" a little closer than some may like.

Will they need it right now with those heads and cam, no, but max port the heads and tweak some things here and there, its something to look out for in the future.

Either way, we both agree it will peak past 6k I look forward to hearing a response if you feel like writing one

 

Here are the DD2000 numbers:

RPM -- BHP
5000 -- 505
5500 -- 544
6000 -- 562
6500 -- 559
7000 -- 542

If you uncap the headers (the previous numbers are through mufflers), the numbers look like this:

5000 -- 522
5500 -- 564
6000 -- 587
6500 -- 590
7000 -- 581

I was thinking a 6300--6500 shift with the limiter of 6800-7000. For the CID he is running, it puts his peak in the 6000 to 6500. If he were running 3.48" stroke, that would put the peak in the +7000 range.
CT

 

ok boys, lets quit dyno racing and get this SOB together and to the track!

 

i'm with joe! lets get this beeatch runnin!!

joe, justin, i got my converter, whatcha doin tomorrow night??


hoostie your car will soon =

and a lot more than that!

later

 

Hoostie,
Check out this thread...the cam they are describing is slightly larger (just a few degrees) than the specs I provided about:

http://web.camaross.com/forums/showt...5&pagenumber=1

 

I have a set of AFR 195's with no porting on the intake side. The intake side is "out of the box" except for a valve job. Here are the flow bench numbers (pre exhaust port work numbers in parentheses)

.1 77 62 (63)
.2 143 124 (119)
.3 197 160 (151)
.4 235 183 (175)
.5 260 201 (187)
.55 263 206 (190)
.6 264 210 (194)
.7 268 217 (199)
.8 269 221 (202)

They were flowed by someone who had no interest in doctoring the numbers, BTW.

I am posting this because I think the comparison is interesting and shows why the larger port heads are not as good for street use. Given the port cross section and the flow up to .550, which do you think would perform better with a street setup? It's the "smaller" head. Same peak hp, better midrange and throttle response with the smaller head. The bigger heads would clearly shine with a big cam with lift over .600" used at high rpm (6,500+). But that is not a street setup, IMHO. A set of ported stock castings is actually the best way to go for a street or street/strip NA motor. Cheaper, works better.

Same principle applies to cams, but a lot of you just don't seem to get it and continue to buy into "bigger is better".

Anyway, good luck with your heads.

Rich Krause

 

I have a set of ported LT1 castings done by Lloyd Elliott. For what I paid (a lot less than what AFR charges for sure), the heads are better. Mine flowed:

.100 66/50
.200 134/103
.300 192/133
.400 239/158
.450 251/171
.500 265/181
.550 272/184
.600 277/190

That compares well against the out of the box AFRs. I know flow numbers aren't everything, but it's a good indication.

Even with a 230/236-112 cam, the car has good low-end torque and now revs like mad. I even took off from a light last night in second gear by mistake.