It took me 3 weeks to decide on the LPE 74211 cam. Now, with the SS Valves I had already planned, plus the additional $300 investment in LPE Double Springs, Lifters and retainers and the possible head work on topo of that, I need to ask the question, should I get bolt on head upgrades? Which ones? As the LT1 heads are reverse cooled, is there anything special that needs to go with the non-stock head?

 

contact Bob@percisionporting.com
stg 2 heads are like 1k i think and they do an awesome job and man let me tell you def a huge boost in hp!!!!
your friend
Sean

 

Are they complete heads, or do I ship him the ones off of the LT1? I just noticed a "end of GP" thread, so, the good deal may be off

 

I went with the AFR heads,it was a long wait but well worth it.

 

stg 3 stock lt heads will out flow AFR heads and are alot cheaper.
you can get them sent to you. for like a $200 core charge and then once installed you ship the old heads and get the 200 back!
its like 1100 normal 1k with gp.
either way its a great deal!
thanks alot your friend
Sean

 

Really so you say a stock lt1 casting with port work and bigger valves will out flow the CNC competion ported 227cc intake runner heads with 2.10 intake,1.6 exhaust valves (AFR part #1126) If you can show me any set of stock casting LT1 heads with whatever kind of work you would like to do to them. I will kiss your butt in public!!!!!!

 

That's a lot of head for a 219 cam. When I see he's going with a 219 cam on an LT1, what's the point of AFR heads? He's going to get all the 219 can has to offer with mildly ported LT1 heads. AFR heads with CNC'ed 227 cc intakes are not going to work on any 350 SBC that used on the street.

Eric

edit, opps, I see he's using a 211 cam. Why bother with any head upgrade with that cam on an LT1? I think he's gonna be bummed after he pays all that dough to install a 211 in an LT1.

 

I agree with using the appropriate size head for the 211 cam; Theres no way that a stock ported head will beat AFR's low and mid lift #'s. which is what this guy really needs. anyone can get big high lift #'s, but at what cost in low end torque? Not flaming, just my .02

 

I have a set of comp ported AFR 195's and there is no way a set of ported LT1 casitngs will out flow them. With that said if the motor is going to remain stock displacment then if it where me I would go with Bob's or TEA's stage 2 mabey stage 3 (Talk to Bob he will point you in the right directtion) and call it a day. The Comp ported AFR's are $2500 and a 10-12 week back order. So tale the extra $1500 and get a nice set of headers and 1.6 R/Rs

 

Lot's of options are in here, but I guess I picked to "mild" a cam to really consider higher flowing heads. Well, I either go back to the drawing board, or finish the mild upgrade.
Initially I was just glad to get the engine bored .030 over and new parts. Now I'm trying to eek out some extra performance, hence the LPE 211.

 

I was in no way saying he should use the heads i was talking about. I was just letting redbullapril23 know that there where heads out there that are ten times better than the LT1/LT4 castings. With my last setup i have gone 10.86 @ 123 mph with a 1.48 60ft with the stock lt1 casting and stock valve size just ported and polished.

 

Yes, with a supercharged 383 !! With forced induction all bets are off on what a head will flow.

 

bob's heads outflow the afr's and are halfway cheaper

 

If you are budget minded there is a guy in Texas who Ports the heads for less then most and they make power. I made 395RWHP with out tuning. It was a 49RWHP gain with just his porting and bigger valves

I see no need to go with any thing but a stock ported casting with the 211. I am getting ready to stuff one in my wifes car this winter. one of my favorite EPA legal cams!

 

I'd have to see it to believe it

 

He may be able to get better #s with a set of ported LT4 heads but I don't think its posible with stock LT1 castings. Here are the actule flow #s for my AFR 195s for comparison.



CFM@ 28''

.200------.300------.400----.500-----.550------.600-----.650
I----E------I---E----I---E----I----E---I----E----I---E----I---E
139-115---205-160-254-185-280-198-283-205-285-210-285-215

 

Look at the flow numbers across the board also here is a link to the flow numbers .[IMG]http--www.airflowresearch.com-pages-images-charts-227cc-Comp-Head-Flow-Graph.gif[/IMG]

 

One thing you have to remember about flow numbers and tests is that its sorta like comparing dynos If head porter A uses one standard and porter B uses another standard, both will get different results on the same head.

I have to agree that theres no way a stock casting would ever flow as much as a full blown CNC'd 195 AFR or larger. And another thing one has to consider is that bigger isn't always better when it comes to heads. You loose a lot of port velocity with the larger runner volumes. And depending on your application going with the biggest and baddest heads may not always be the wise choice. You will in some cases loose a lot of performance in the bottom end, only to gain it on top. But if you don't have the cam or the internals to get that top end then you loose both ways. Its all about picking components that compliment each other, thats the key to making big Hp numbers.

For Jimbomills engine using the 211 cam. I would advise him to go with a set of ported stock castings. Or a set of LT4 heads. TPIS has a good deal on their off the shelf CNC ported LT1 heads that are sold on a exchange basis. They also have their 187cc CNC AFR heads on the shelf with no exchange. In that case Jimbomill can sell his stock heads to recoup some monies spent on the heads. In Jimbomills combo theres no sense in going with LARGE ported heads because his cam choice will not support the heads. A smaller ported head will promote large torque gains in the low and mid range with his cam choice with a good top end run out. Thats my experience with the 211 cam. Its a good cam that will easily pass emissions and it also has very good performance gains. LPE used this cam in their 383 conversions back in the mid 90's in all their F and Y body cars.

 

I would have gone with the 219 cam if it were me. For all the hassle of installation, I would go with the max cam I could. I know of a company that will buy bare AFR heads and load them up with what they want. Als they will fluff them up for not too much more money. www.hitechmotorsport.com is the name and I like their work.

 

Many thanks for your recommendations, not to mention the cam
Anyway, do you have a link for TPIS? my search turned up an "under construction" reference.