Pro86tourn

Hi guys/girls new to the site but long time lurker. Member over at Gbodyforum and pro-touring.com. Built my 6.0LS this season finished it up in September and now the season is coming to an end, got a deal on a 6.2 and have been gathering parts all summer for a future stroker build! The plan was to bore the 6.0 out .70 over but now start fresh.

I need some help and this is in regards too compression.. Using many of the parts I already have below trying to save costs by reusing what I can from the current build. The pistons I got for a good deal and are unused.

AFR V2 230 heads (62cc)
Wiesco .070 pistons +5cc

This will put my compression way too high to use pump gas.. If I have a custom gasket made .90 that should put me around 12.15.1.. my question is on a N/A motor will this cause me any issues with quench, reliability etc? Or should I shave some meat off the pistons.. which I really dont want to do.

As for the current build plan here it is.. feel free to comment/make suggestions

6.2 block
4.00 crank, 6.125 rods, .070 pistons +5cc
AFR V2 230 cathedral heads
Victor Jr
Pro Systems 1000 CFM carb
Stock rocker with Trunion kit
LS7 lifters currently but am undecided... might upgrade to CTSV or Johnsons
Custom Cam Motion cam - 246/252 111.5+2.5
TKO 600 Trans

thanks!

Corona

I'm happy to see a Carb intake. Rpm goal of 7200 to 7500? More mid range to peak with the cam and intake choice?



I'm Bored...
🤔 sitting in Camron louisiana in the middle of NOWHERE (marsh land > Homes), got my phone and Pluto Tv 😉🙃. BTW no electricity 🤣. Have Camper and generator will travel. Movie ref: Have gun Will Travel. Looks like a Bomb exploded. 🤔 Hurricane will do that? 😔🤨
Months after the fact 😔

Pro86tourn

Yes, looking for more midrange. will run it up to no more than 7500!

Im nuts but I still enjoy carbs

Corona

On your question of:
If I have a custom gasket made .90 that should put me around 12.15.1.. my question is on a N/A motor will this cause me any issues with quench, reliability etc? Or should I shave some meat off the pistons.. which I really dont want to do.

Answer is: Either or. Fly cutting or cutting on pistons for a lower Compression is do able if there's meat on what's being cut? But 👎 Having gaskets made is Easier 😉
No issues with what your thinking your just giving space to lower your compression if the pistons out to much Deck wise, with a milled head. Do as normal check P/V clearances keep moving....

Pro86tourn

Yes, my concern is running detonation running too large of quench thickness. My gut feeling just doesn't feel right! Curious to see what if any engine builders chime in!

Corona

Make sure your calculations are correct.....

Launch (my Buddy) is talking about using 2 gaskets. 🤫 We just talking about creating space.

🤔 Or open up the Head chamber to your desired compression ratio? < Updated? < Engine builder chime in 😏 I just don't touch'em much😉.

https://www.yellowbullet.com/threads...ce-cr.2584705/

Pro86tourn

I really don't think stacking head gaskets is safer than running a thicker gasket all together.

No offence on the engine builder comment, just hoping to get some other ideas as well

grubinski

If it was my engine I'd take it out of the pistons so I could retain decent quench. I wouldn't run any gasket thicker than stock.

Pro86tourn

Maybe ill have to sell the pistons then.. .really annoying but what can I do. I was hoping it would be okay to just run a thicker gasket.

Corona

That was the joke 🤫
If it were me: I'd open the combustion chamber from 62 cc to 🤔 66 cc, if I could 68 to 70cc and gasket the rest. Cheaper than buying pistons, don't ask how I know 🤐. 🤫 Don't go telling everyone, but I've got .030 over flat top pistons for a 408 and dome tops Paid for . Still need to sonic test 1 of the 2 blocks I got for the second set. Your wanting to lose compression, I want more of it. BTW 62cc heads 🤔 me to, ✌️ pairs of.

Pro86tourn

To be honest I don't trust any shops around me (Toronto Canada) to touch the heads. I think I am just going to sell the pistons and end up buying a new set that will would better for the application.

Any other comments on the build Ive spec so far?

Thanks guys!

old motorhead

iTrader: (10)

Ok, so here it comes....why not use some LS3 heads (70cc chambers) and save a whole lot of trouble. They're really not that bad.

Pro86tourn

The AFR 230 heads I literally just bought 2 months ago and are brand new and will make more power. Im Canadian so by the time they got to my door they were pretty much $5000 CAD. Hard to take a loss that substantial.. that's the main reason!

Im selling the LS3 heads to recoup some of the costs of the engine purchase

Corona

Just send the heads out for the chambers to be opened up. Done. $50 dollar shipping Charge? Work to be done Minimal in cost🤐✅
Happy to be back in the City 😉

If I can find the time this wk-end, which I can't.
🤔 Shop's closed on wkends, but I need some sonic testing done. Maybe set it up on Monday, Vet. deal this time around 😉. Can we say no to these 12.1 JE Flat tops 🤨 and yes to a bigger bore dome top.
Yes🤫

Corona

Funny thing is your talking about selling to re coup some of your $. I've paid for pistons with a New set already ready to be used. I refuse to give away a $1100 set of pistons and rings for $600. Naw I don't want to sell them... Y?
Cause there Stand by piston on general purpose 🤣

🤔 The guys who are doing my build may need a set of ......now we talking my language $850 Sold.
They do Alot of LS builds and others, GG's there also 😉 Tuskey.
🤔

Pro86tourn

you like the JE vas the Wiseco?

Corona

I'm no 1 brand guy. Weisco, 💎 piston, Carillo all have a Great record as well as JE. I lean more on who has what fits my application and it's cost off the shelf vs a custom piston. Carillo has Dome tops that works for me 🤔14.5"ish is My minimum with sizes ranging from .030 to .080 over for a 4.0 crank and a great guy I met over the phone..the also use tha, same 1.5 /1.5/3.0 Total Seal rings I got for my JE Flat top pistons @ .030 over. Mahle has a 1m/1m/2m ring package that matches my minimum compression ratio of 14.5 Now if I can get AnyThing more than . 030 over with Either block Mahle FTW. If stranded @ .030 over Carillo & I can use tha Total Seal rings.

Corona

🤔 on a favoring a particular brand of piston vs off the self. JE doesn't list anything with a decent Dome top so that would be Cu$tom vs OTS(off the shelf)...

know a guy who makes this piston 🤫👇
14.5+ depending on gasket and deck height with 62cc heads
https://www.texas-speed.com/p-7517-c...0mm-steel.aspx
👆~>
14.5 + also depending on....with a smaller ring package. 🤔 If neither block goes this route .030 over piston from the CO listed above using already purchased T/S rings ^👆
https://www.lsxceleration.com/mahle-...kit-930229670/

🤔 On which piston is better it all depends on builder preference and or Dealer whole sale deals with Multiple purchases. I use the who has what I want to accomplish method.

Again have the chambers opened by a professional shop to get the compression wanted... top of my head ask (BES-Robert I think, FED-Chris, Mast-Darin etc) 2 do the work + shipping. Vs losing money then going out then buying new pistons.😉
Call and price having the chambers opened up VS your idea 😉🤫😏