resleave for high compression build?
is resleaving required if I wanna go big compression? like 12.0 + or would I be fine with some forged pistons, rods, and ARP rod bolts. ?
about 1000 to get the block sleeved. i dont know about getting it ported. might cost different from each place to place and the price of sleeves.
12.0+ is going to be really high on 91 octane unless this is going to be run off race gas or your own custom mix. I think right about 12.5 is the limit for 91 even with a good tuner.
Any reason why ? What type of cams are you going to be using? and is this for an H22 or a B18?
Id just stick with some Type S pistons and call it a day at 11:1 maybe bump it a little bit more with a thin head gasket.
Any reason why ? What type of cams are you going to be using? and is this for an H22 or a B18?
Id just stick with some Type S pistons and call it a day at 11:1 maybe bump it a little bit more with a thin head gasket.
while we are on the topic, how do you guys feel about the frm sleeves holding up to the jun pistons (12.3:1) compression....what head gasket would you think, i dont rly want to bump the comp. any higher than that, but maybe some of the aftermarket head gaskets have cooling advantages???
also, if i get these pistons and the jun cams, the car will be good for power up to about 8500 rpm, what do you think the bottom end will need...can i keep the stock stuff and do some kind of treatment to it or go for some aftermarket rods??
thanks
edit: im assuming the 8500 rpm number b/c i have seen dynos of jun cam h22s making peak at like 8450 rpm....
also, if i get these pistons and the jun cams, the car will be good for power up to about 8500 rpm, what do you think the bottom end will need...can i keep the stock stuff and do some kind of treatment to it or go for some aftermarket rods??
thanks
edit: im assuming the 8500 rpm number b/c i have seen dynos of jun cam h22s making peak at like 8450 rpm....
Trending Topics
just the cost of the jun pistons and rods has scared me away from them. Supposedly their coating or whatever process they used in making the piston, makes it compatible with the FRM lining, at least on the few accounts ive seen.
I just cant see spending $1K for pistons and $1K for rods, with a compression i probably wont be able to fully use due to living in Cali and only being able to get 91 octane. As i had stated before, id rather get some flat valves, type s pistons, and maybe a thin head gasket and call it a day. If you dont want to bump the comp with a head gasket, stick with the OEM. Usually people switch head gaskets to raise/lower compression.
EDIT: The jun cams do make power in 8500 but i dont take my stock bottom end past 8K. Also, get a nice valvetrain setup that can handle the Jun cams or you will have coil bind and possibly drop a valve which = dead piston in most cases and cylinder wall scarring.
I just cant see spending $1K for pistons and $1K for rods, with a compression i probably wont be able to fully use due to living in Cali and only being able to get 91 octane. As i had stated before, id rather get some flat valves, type s pistons, and maybe a thin head gasket and call it a day. If you dont want to bump the comp with a head gasket, stick with the OEM. Usually people switch head gaskets to raise/lower compression.
EDIT: The jun cams do make power in 8500 but i dont take my stock bottom end past 8K. Also, get a nice valvetrain setup that can handle the Jun cams or you will have coil bind and possibly drop a valve which = dead piston in most cases and cylinder wall scarring.
i know about gettin valvetrain....and i know how much they cost, but i got a guy that can get me a deal on em.....
what im wondering is do i need aftermarket rods to get to 8500, probably yes but wanna make sure, and what do i need to do to the crank to get it reliable to go that high??
what im wondering is do i need aftermarket rods to get to 8500, probably yes but wanna make sure, and what do i need to do to the crank to get it reliable to go that high??
If you have the cash, and the motor is already apart, then you may as well put some beefy rods in there to handle the new stresses. The crower rods look like friggin monsters and should serve their purpose. Again, i love Jun stuff, but thats a hefty price tag for pistons/rods.
Id say get the crank cyro treated, it should add some strength to protect from high heat and high load.
Remember spinning an h22 this high, nothing is guaranteed to last. As the saying goes, "if you aren't breaking things, you aren't making enough power"
Id say get the crank cyro treated, it should add some strength to protect from high heat and high load.
Remember spinning an h22 this high, nothing is guaranteed to last. As the saying goes, "if you aren't breaking things, you aren't making enough power"
I am biased to the JUN pistons for two reasons. weight of the frm block and heat disapation advantages of the frm.
plus if you sleve and buy a set of weisco's then you will be spending approxomatly the same price. the piston can be used on any h22 rod with machine work. and this can be done for fairly cheap. And yes the pistons do work on the frm walls and last. reliability is excellent.
plus if you sleve and buy a set of weisco's then you will be spending approxomatly the same price. the piston can be used on any h22 rod with machine work. and this can be done for fairly cheap. And yes the pistons do work on the frm walls and last. reliability is excellent.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by junbb1 »</TD></TR><TR><TD CLASS="quote">
plus if you sleve and buy a set of weisco's then you will be spending approxomatly the same price. the piston can be used on any h22 rod with machine work. and this can be done for fairly cheap. And yes the pistons do work on the frm walls and last. reliability is excellent.</TD></TR></TABLE>
But running the JUN pistons on pump gas will require a bit more tuning and alot more prayers than other forged pistons with lower compression...
plus if you sleve and buy a set of weisco's then you will be spending approxomatly the same price. the piston can be used on any h22 rod with machine work. and this can be done for fairly cheap. And yes the pistons do work on the frm walls and last. reliability is excellent.</TD></TR></TABLE>
But running the JUN pistons on pump gas will require a bit more tuning and alot more prayers than other forged pistons with lower compression...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SpanishRicer »</TD></TR><TR><TD CLASS="quote">
But running the JUN pistons on pump gas will require a bit more tuning and alot more prayers than other forged pistons with lower compression...</TD></TR></TABLE>
I dunno I ran 12:1 Endyn on 94..tuned
I don't think you have a problem if you tune well..
But running the JUN pistons on pump gas will require a bit more tuning and alot more prayers than other forged pistons with lower compression...</TD></TR></TABLE>
I dunno I ran 12:1 Endyn on 94..tuned
I don't think you have a problem if you tune well..
Thread
Thread Starter
Forum
Replies
Last Post





