So you noticed that too... Almost everyone has said not go below 9.3 I was really surprised how everybody was against it.... Thanks I appreciate it though!

 

Maybe you could call Ford Racing like you might buy their shortblock and pick their brain...

 

That actually isn't a bad idea; kinda see where they are getting their power with a similar setup...

 

When it comes down to it, FRPP also stands to lose a lot if their name were to be tarnished. If someones buying one of these motors it's because they plan to lean on it. The more you push it the more chance of something breaking - they can keep this in check (somewhat) through this

From what I've read FRPP is also going to be releasing a higher CR version, somewhere in the 9.3 range.

 

Really how long till that comes out???

 

Sometime earlier this year don't hold your breath waiting on it. The point I was trying to make is FRPP has an incentive to air towards the side of extreme caution even if it isn't completely necessary.

 

Yeah I follow where you are coming from... Unfortunately I don't have that kind of time to wait...

 

my buddy was not running a s197, however some principles cary over. He was running around 20psi with pump gas & 30+ on e85. Piston developed a large hole, on his next rebuild he put the cr @ 8.5:1 and runs 23psi on pump & 33+ on e85. His track times have gotten better and the car makes a bit less tourque off the line but more than makes up for it when he is rolling. The torque curve has gotten fatter but slightly wimpier off the line which is perfect for street tires.


This is going to be interesting regardless. I hope to hear good news. Should be a mean machine.

FYI; use ford bolts and gaskets for the heads. The ARP hardware can cause cracking for street applications.

 

What are you serious about the ARP bolts etc???? Why would it cause that? And why would ford stuff be better???

My thinking with when I was going w/ a lower compression was somewhat similar where about I wouldn't have so much TQ off the line but as I roll the power builds... I still feel somewhere b/t 9.1 - 9.3 shouldn't be too bad of a problem.

 

From my understanding from a reputable modular builder. The stock hardware has more compatible expansion and contraction rates with alu vs ARP set, they said the constant heat cycles a street engine goes through will cause fractures on the block. I was told to NOT use the ARP hardware unless im racing and im taking the engine apart often and replacing parts. The stock hardware from my understanding has shown to hold at least 700whp. As for gaskets, the stock ones are cheaper and are mls from the factory so going after-market is not necessarily better.

From what I was told the only place arp hardware can be used is forged rods where the arp stuff is more compatible with. Everything else should be stock hardware.

My bet is that if you go with an iron block then its fine to use ARP.

As for compression ratio, I would still invest in a meth/water injection method. They are not that expensive. At least when you start upping the boost. Besides safer running, it will keep carbon from forming.

 

From what I understand of what you are saying; it is the ARP units that are stronger than the alum. itself and eventually will cause stress fractures etc??? As for the gaskets you are probably right... As such I am running an aluminum block so I will talk to the shop about this and see what we can come up with...

I feel depending on how much boost I run a meth injection will eventually be necessary but that being said I believe I would have to have the rotors in the SC Coated wouldn't I???

 

[quote=PIKE2244;5973851]From what I understand of what you are saying; it is the ARP units that are stronger than the alum. itself and eventually will cause stress fractures etc???


I don't believe he means they are necessarily stronger...what he's talking about is heat cycling ( rapid heating and cooling ) and the difference in the expansion and contraction rates of the 2 different metals. For example, let's say the bolt and the block ( or head ) are heated at the same rate, to the same temperature, but the bolt expands much more and faster than the aluminum....the aluminum is liable to crack because it can't expand at the same rate, to accomodate the increased size of the bolt it is surrounding.

 

Yeah I gotcha on that one.... To be honest I have never ever heard of an issue with ARP studs etc and problems with expansion / contraction.... Not to say it isn't true I just haven't heard of it...

 

To be honest, I was skeptical as well. In any case, that is what I was told. it makes sense if you look at one side of the coin.... the other side of the coin is something else.

 

I'm not sure how much worth I put into this, 22k miles and ARP everything with no problems


I understand the logic but when it comes to a company that specializes in fasteners, I have a hard time believing they don't take this into account when they do in fact take into account bolt stretch involving different lubricants.

 

Yeah I agree it just isn't likely they haven't taken this into account!!!

 

No offense there but 22k is nothing for a daily driver capable vehicle. I put in 12 16k a year that includes sub zero temps and 110f days.

 

Mine gets driven in all of the above weather conditions, every chance I'm at home which is about once a month. No offense taken though.