High or low compressioned 418?

[moneypit94]

Well i can't seem to get my 418 sold so im thinking about upgrading the pistons in it. It has all forged internals except for the pistons. (don't ask me why cause i have no clue)

I am just not sure what i want to do with it. If i go low compression then i could put a supercharger on it fairly easily. Or should i put higher compression pistons in it and run NA?

Which would be easier to sell if need be? Could put this in my car and sell my motor?

Right now im thinking of selling the heads and cam off it and putting in custom cam with afr 205's or so on it with the upgrade on the pistons. Also putting in some steal main caps.

Would this be a good motor to run lets say 6500-7000 rpms? Or is this just too much for that many CI's...

What would a complete motor that is blue printed, balanced, with forged internals, decent block (69), custom cam, AFR 205 heads and trickflow R intake with furnishings be worth with less then 300 miles? Would upgrade it to sell it for more if its worth it?

 

[Joes95GT]

I'm a naturally aspirated guy, so my vote is for high compression pistons.

That motor would never live under a 205 head. You're better off with an AFR 225 or TFS-R if you don't want to spend too much. If this is an all out race motor, a Victor Glidden, or Blue Thunder head would be better. With a stout cam, and the right springs, locks, retainers (blah blah), you could rev the motor to 7500. The heads, manifold and cam determine the ability of the motor to rev.

I can't comment on the selling part. The motor is only worth as much as what the buyer thinks it's worth.

Joe

 

[moneypit94]

Its not an all out racing motor... It will still be a street/strip motor... You say the 205's aren't enough, i was looking at the difference between them and the TFS r heads and there isn't much difference. Actually the 205's have the same valve sizes and actually out flow the R heads throughout on the intake side and are just a little behind on the exhaust side according to trick flows advertised numbers and AFR's advertised numbers. Thats an AFR head vs a Blended & Polished R head... The cast TFS R head didn't flow near as much...

 

[Redsnk95]

11.5:1 pistons with AFR 225 hi-rev heads and a AFM N111 camshaft, TFS box upper intake....

Troy

 

[331 cobra]

I read your classified add for the 418. You said it was professionally built. If you replace the pistons, you are going to have to get the crank ballenced again if the pistons don't weigh exactly as much as what you took out.

You also said it was supercharged and made 775hp, I'm slightly confused. Does it have blower pistons?

You should post the entire combination, crank, rods, pistons, heads, cam and flow numbers if you have them. If you still want to sell it, you should include brand names and the builder's name.

If you are going to change heads, my request is the new Jegs heads. They sound pretty good and should have no problem supporting a 418, and I want to see what they wil do.

 

[ProKiller]

high compression! a motor with those cubes demands a NA setup.

 

[moneypit94]

331 Cobra: Yeah i know i would have to have it rebalanced.. It has 10:1 hyper pistons in it now... And yes those were used with the blower to make that hp... This was all on a set of tfs heads and an X303 cam...

The rods are forged h-beam rods and the crank is a forged crank. 4.03 bore, 4.1 stroke. It has ported and pollished tfs twisted wedge heads. and Trick flow R intake.

Im going to take the pistons out here soon and have them weighed and see if i can't find a set of forged pistons with the same weight, otherwise i will have to get it balanced. Balance is like 170 + the cost of gaskets and rings and stuff.

 

[moneypit94]

Well i just put a bid on a set of new 205's... If i win they will be shipped for 1500.. Anybody else feel free to bid, this is one of those if i win well good but if lose, its probalby better off deals.

I know some of you said these aren't big enough but for the price i will live with it. They have to be better then those twisted wedge heads on it now. 2.08 intake valves and 1.60 exhaust. max lift of .670

 

[yellow1995Cobra]

Id go high comp and run n20 with it. N/A the car should be capable of taking out almost anything on the road, but have the n20 just incase

Must be nice to have a 418, and a 500hp blown 331 to choose from! Oh what a choice..

 

[moneypit94]

If i win this auction my new plans are to sell the TFS R intake, injectors, TB, MAF, and fuel rails and buy a 351 spyder intake to go on it. I need to find out if the ports will match up in size with the 205 heads... Also plan on running about 6500-7000 rpms... Im really starting to get into this now.

 

[Joes95GT]

Its not an all out racing motor... It will still be a street/strip motor... You say the 205's aren't enough, i was looking at the difference between them and the TFS r heads and there isn't much difference. Actually the 205's have the same valve sizes and actually out flow the R heads throughout on the intake side and are just a little behind on the exhaust side according to trick flows advertised numbers and AFR's advertised numbers. Thats an AFR head vs a Blended & Polished R head... The cast TFS R head didn't flow near as much...

Flow numbers aren't anything. Case in point: Did you see the MM&FF article where the AFR 225 head was outperformed by the TFS R on the same motor. The TFS R is the best "budget" head for a stroked Windsor. Many can disagree. We're all entitled to our opinion. I personally am not a fan of TFS products. However, we cannot overlook the facts that the TFS R head is an awesome cylinder head.

Joe

 

[stangboy]

I'd say go high compression and stay N/A. Maybe puta shot of n2o on it just incase you might lose the race n/a...you know, kinda like insurance . As for TFS R heads or the AFR 205s, both are awesome heads I don't think you'll be disappointed with either. So are you definately gonna sell this motor or are you considering keeping it since you're getting better heads and stuff? or are you just getting better parts to make the motor more marketable?

 

[moneypit94]

I haven't figured out if im going to keep it or not. If i do put these parts on i may put it up for sale. It sorta depends on the money situation. I have a small dept to consider right now too. I have low interest and pay a nice chunk off every month but i on the other hand keep adding new stuff to it.

I emailed Ed to see what he thought i should do. He will be grinding the cam for it and everything. I like the idea of NA with nitrous... And then i think of how insane it would be to put my s-trim on it (probaby isn't big enough but im sure it would still push a decent amount of air through it...) That lower compression would make it so much more street friendly i think.. I don't know... I better figure this out pretty quick...

Then again what would the bigger demand be for, if it tryed to sell it. NA motor or a blown motor? Probably NA...

 

[stangboy]

Then again what would the bigger demand be for, if it tryed to sell it. NA motor or a blown motor? Probably NA...

That would depend on the buyer. I think there are an equal amount of blower vs. N/A people out there. But there are nitrous people out there too and nitrous has really nice results with higher compression. I think you'll be able to sell it either way. As for price, it probably costed you a pretty penny to make it the way it is/gonna be, so don't short-change yourself and you efforts when its time to sell it.

 

[Numbles]

Go with about 10:1 compression that way you can still run pump gas. But definately keep that motor. It would be very impressive to see a mustang with a stroked winsor in it. Ive never seen one personally. But your one step ahead all of us in that type of project being that you already have the motor.