FUlly ported TFS heads from Lloyd shouldnt cost more than $2k... you can use stock LT1 intake manifold...ported for $300.

 

Are the casting supplied by LE or do i have to supply them.

 

I dont know. I bought AFr castings and he ported them for me (I shipped them to him)... total was $2000 including all valvetrain. I would get are TFS heads (probably cost ya $1000) and send them to LLoyd for porting and setting up valvetrain.

 

If you want to see 700rwhp you will need not be able to use the heads "as cast". They will need either hand porting or the factorys CNC porting. A good hand port will be best.

Rich

 

So, far I have not seen a car with the TFS heads make that kind of power. Not saying it's not possible, just that I haven't seen it.

Rich

 

Yeah, I havent seen any yet, but soon. Lloyd is pretty much getting the same flow out of his ported TFS heads compared to his ported AFR210's. His ported AFR's flow a tiny bit better, but not worth an LT4 style head considering the problems geting a LT4 manifold. Atleast you can run a stock LT1 manifold with the TFS stuff.

 

it's the conclusion I've been coming to for about a year now, that making power with a blower car is all about the top end. Is this correct?

The reason we are seeing blower cars with a D1 making 500 hp maxed and then others maxing out making 650 is some spent more on the heads, intake and valvetrain?

 

Dont know how much hp were making widh loyd ported TFS and cam from Bret (big difference on different HP calculators) but best trap speed is 141.5 and best ET 1.50 9.82 widh a race weight of 3635lbs, widh a 50shot N2O i got it to hook perfect and did run a 1.38 9,44 143 still 3635lbs (any gueses on HP?)
Now to the topic, Since we converted to a 2x6 rib set up i havent seen any belt slip on oure max reved F1, I lined up the text on the 2 belts before the last race (8-9 runs) and the text were still paralell after the event (no rubber dust on the SC at all after 6events and a lot of street driving)...
last year (F1) we had a 8rib setup and i saw a few 1-2 psi dips at the end of the 1/4 so i cant really see why the procharger belt tensioner could have got this bad reputation??? (8rib were from my first P1SC)
So my wote goes to F1

 

Guess the price can go either way. But if you're talking AFRs then I don't think my guestimate is far off. $1100 for bare AFR heads and another $1700 in porting assuming Lloyd includes the valves, locks, springs, etc... that's already $2800. And if you don't have an LT4 manifold already, well, good luck finding one at a decent price.

 

How does the 6X2 belt setup work? Do you simply use 2 - 6 rib belts in place of a 12 rib?

 

I have AFR heads on my car, but they are only the AFR 180. Granted they were ported by TPIS, but they are still only the 180 series. That being the case my car still made 590 at the wheels on a hot day on a mustang dyno. I am sure that if I moved up to some AFR 210's I would see a marginal increase to perhaps 670 with the same atmospheric conditions.

 

LLoyd charged $700 for port work for me, valvetrain was under $500 and I got the heads bare from HPE for $850 on sale.

 

Not to steal this tread, but what seems to be the maxing out point, for a blower car, on stock, ported heads. Say like a LE3 headed, blowercammed, car.

 

The highest ones I see are in the low 600rwhp range.

Rich

 

My Ported Factory LT4's ran 159 mph @3450 race weight. Vortech YSi