TeEnAgE pHeNoM

iTrader: (6)

Just as the title says. I've been in contact with Martin from Tick and he will be helping me with camshaft selection. I know Martin is a fan of the AI HCR 241 heads because of the additional piston to valve clearance these heads provide. I will be shooting no less than a 250 shot but more than likely 300-350 so the camshaft will be a max effort nitrous grind. I do not care about dyno numbers as I am more concerned with chipping away at the SBE nitrous record. All you nitrous gurus what are your opinions?

AI HCR 241
TEA or AI 243 heads with additional exhaust porting for nitrous
Trickflow 215s with additional hand work by Brian Tooley
Hand Ported 243's by Brian Tooley
???

Flycutting is not out of the question however I'm concerned with the integrity of the stock pistons with as much nitrous as I'll be spraying. Also I'm not interesting in spinning the car past 6600-6800rpm.

Regards,
Jacob

GrimReaper

iTrader: (33)

Got some TEA TFS 215's BNIB up in the for sale section if you are interested

TeEnAgE pHeNoM

iTrader: (6)

I appreciate the offer man, but right now I'm concerned with getting this combo right.

GrimReaper

iTrader: (33)

Sorry, i thought you had mentioned TFS 215's

Brian Tooley Racing

iTrader: (13)

If you were N/A or boosted the 215's with some tweaks would work great. Nitrous needs more cross sectional area including valve diameters. The problem with the 243 heads is by the time you installed intake and exhaust seats for the larger valves and bought the castings you would have as much in them as a aftermarket set of heads. The aftermarket castings will hold the head gaskets better also.

The TFS 225's with the N2O exhaust port, properly port matched to an intake, would be my first choice. Options like the powdered metal guides so you can run stock rockers would be a bonus, as well as LS3 valves turned down to fit.

The intake manifold is going to be important also, what are you wanting to use there?

TeEnAgE pHeNoM

iTrader: (6)

Thanks Brian. I'm wanting to stay with an ls6 intake manifold and have it ported. I'm not a big fan of the fast intake unless YOU think it would be worth the gains. Personally I'd rather just up the shot lol.

hardcore

iTrader: (2)

I'm running the PRC 237 on my stroker and they have been great..
I think Texas speed had a lot of luck with there PRC 227 on a stock ci motor.
and the price is not that bad.. around $2300

TeEnAgE pHeNoM

iTrader: (6)

I appreciate the suggestion. I'm open to all options so I will take it into consideration.

Brian Tooley Racing

iTrader: (13)

The key with nitrous is cross sectional area. In my opinion a LS6 intake can't be opened up enough to be worth the effort. A Fast 102 would be a far better intake on the spray because there's enough material to open it up.

If you're a DIY guy and can tig weld aluminum, an old Holley intake with the TB flange replaced for a 90-102 TB and then fully ported actually work well with nitrous. When I switched from ported truck heads and LS6 intake to ported 243's with big valves and a ported Holley intake back in 2003 I picked up 96 rwhp on the same shot of N2O with no other changes. I went from gaining 200 rwhp on a 250 shot to gaining 296 rwhp on the same shot.

TeEnAgE pHeNoM

iTrader: (6)

Thanks Brian. I'll definitely be getting in contact with you soon!

Dynospeed

iTrader: (3)

Trick flow 225 with the nitrous exhaust port hands down. You have to ditch the ls6 intake on a max effort build, the fast is better but a highly suggest a single plane intake with a top facing throttle body. Minimun a Vic jr and 4150 tb. No elbow btw.

TeEnAgE pHeNoM

iTrader: (6)

This is a street car. Full weight. I'm not putting a single plane and cutting the cowl on a 21000 mile car. The car won't even have a roll cage.

Btw. Could you elaborate more on your cam only setup?

Dynospeed

iTrader: (3)

https://ls1tech.com/forums/nitrous-o...ack-times.html

Here is a old link. It weighted 3110 on the 9.7x pass and had a little more timing in it but everything else was the same. If you feel that way you have to get a fast and work it over are you will really limit those tfs heads.

camscam02

iTrader: (21)

You can buy my heads off my motor which holds both 1/8 records for sbe and stock cubes pretty cheap. They will go 8s with the right setup

1.35 5.870 118 on a 26x8.5 at 3250

TeEnAgE pHeNoM

iTrader: (6)

Pm me price and details!

Carter01

iTrader: (11)

Hey Jacob,
These are what i just bought about a month ago. I haven't installed them just yet, waiting for a few more things to come through.

http://www.texas-speed.com/p-3515-pr...ral-heads.aspx

TeEnAgE pHeNoM

iTrader: (6)

Keep me updated on how they work.

EDIT*Just realized the prc heads are as cast. Wasn't paying much attention. Lol.

MUSTANGBRKR02

iTrader: (91)

Bigger CC equals less compression.

Dynospeed

iTrader: (3)

I take it as he wants to keep his compression down just a little compared to 62cc for possible future boost. Unless you are sure you are going FI in the next year I would go with the best combo especially if you are chasing the sbe record. Those prc as cast heads look very nice for the money but they are way more comparable to tfs 220 as cast heads. I would also be going down to 58-60cc chamber depending on the rest of your combo on the tfs225 heads with the nitrous exhaust port.

StrokerTA

So wait, you are going to build a max effort SBE motor, try to spray 400 at it, and not put a roll cage in it even?
I smell disaster..
Carry on..

FWIW the fastest nitrous stock cube ls1 runs Dart 225's that I ported in house.