max revs on stock bottom end?

**Schwuppes** · 01-25-2014

hi guys,

Im getting a XP hot cam installed soon with all the goodies....pretty sure that cam makes power up to 6500rpm. Is it safe to spin a stock bottom end that high? Otherwise could just tell my tuner to back down to 6200 rpm or so...

Whats your experiences?

cheers

**dsmuts** · 01-25-2014

I've revved mine that high but wouldn't really recommend it. I'm sticking to 6-6200

**l67ss** · 01-25-2014

Yeah these things are buick engines with crappy oilling systems

**Scottydoggs** · 01-25-2014

its not a buick engine lol its a Chevy technically. they all used the same engine across GM. its your valve springs that will hate you at those rpm's

**l67ss** · 01-25-2014

No its TECHNICALLY a buick engine. Do some research. Designed by buick in the mid sixties. I had an 81 olds with a 231 and an 86 olds with a 455. Almost identical in basic design. Key design/flaw is the oil system which is like no chevy engine ive ever seen. And its technically a gmcorporate engine if your wanting to play that card. Try again[ QUOTE=Scottydoggs;1174859]its not a buick engine lol its a Chevy technically. they all used the same engine across GM. its your valve springs that will hate you at those rpm's[/QUOTE]

**Iceman6669** · 01-25-2014

http://www.youtube.com/watch?v=b0ed0Og1DNo

stock bottom end...

**Twizted 1** · 01-25-2014

Good lord, that thing Screams!

Sent from Not so smart smartphone

**Scottydoggs** · 01-25-2014

you talking the 80's, olds Buick Pontiac and Chevy were all still a bit different, most common things that were different looking was the intake manifold, the timing cover and the water pump.

olds Pontiac and Buick all looked similar, (not the same at all) and Chevy was way different.

once the 90's hit they all used one engine pretty much across the board, aka the Chevy engine.

note how the same l67 is in impalas, montie's, regals, riviera's, gtps, park abe ultras, and bonnies. they all use the same engine

**l67ss** · 01-25-2014

And the whole front cover and oil filer adapter scream buick

**l67ss** · 01-25-2014

Yeah and chevy was the last to get them. Its like saying a duramax is not a diesel cause its in a chev. After tearing apart a bunch of l67s i noticed the disassembly and design is nearly identical to my 231

**Twizted 1** · 01-25-2014

Originally Posted by l67ss

Yeah and chevy was the last to get them. Its like saying a duramax is not a diesel cause its in a chev. After tearing apart a bunch of l67s i noticed the disassembly and design is nearly identical to my 231

Technically you and scotty are both off on your statements, since the mid/late 80's
Pontiac, buick and the like hasn't designed any engines. GM took the market and designed all of the engines for their B*tch companies that built cars to make GM rich. Then later gave them an excuse to file bankruptcy.
But the engines are specifically GM.
Not chevy or buick. Im with scotty though, they are designed more like the Chevy minus two cylinders.

And the duramax was designed by izuzu. Lol. Let's not attack that sh*tty subject

Sent from Not so smart smartphone

**l67ss** · 01-25-2014

DIESEL ENGINES WERE DESIGNED BY A MAN BY THE LAST NAME DIESEL. Troll attempt, fail. And what in the design aside from the lifters is more like a chevy? Are saying i can use the parts to tipswap a chevy. Or that i can use 4.3 parts to get eid of the external oil passage?

Originally Posted by Twizted 1

Technically you and scotty are both off on your statements, since the mid/late 80's
Pontiac, buick and the like hasn't designed any engines. GM took the market and designed all of the engines for their B*tch companies that built cars to make GM rich. Then later gave them an excuse to file bankruptcy.
But the engines are specifically GM.
Not chevy or buick. Im with scotty though, they are designed more like the Chevy minus two cylinders.

And the duramax was designed by izuzu. Lol. Let's not attack that sh*tty subject

Sent from Not so smart smartphone

**Turbocharged400sbc** · 01-26-2014

Originally Posted by Twizted 1

Technically you and scotty are both off on your statements, since the mid/late 80's
Pontiac, buick and the like hasn't designed any engines. GM took the market and designed all of the engines for their B*tch companies that built cars to make GM rich. Then later gave them an excuse to file bankruptcy.
But the engines are specifically GM.
Not chevy or buick. Im with scotty though, they are designed more like the Chevy minus two cylinders.

And the duramax was designed by izuzu. Lol. Let's not attack that sh*tty subject

Sent from Not so smart smartphone

sorry but its a buick...it shares no architecture with the sbc based "chevy" v6 aside from them both being split journal on center v6 engines
it does however share every major component with its ancestors. you can bolt a 62 buick v6 head to an 09 SII...same bolt pattern...right down to the same 7/16ths threads in the cylinder deck.

the LC3/LG3/LN3/L27/SI L67/ and the SII (L26/36 and L67/32 are all buick decendants...not a damn one of em is a "clean sheet" design....you dont think gm fired all their engine guys that were champions of the turbo buick...no they rolled them into developing the v6 further. lotta buick enthusiast in GM...

plain point of this is that the 3800 is a direct buick v8/v6 descendant and shares little with the much younger chevy v6

**Fivefingerdeathpunch** · 01-25-2014

Stick with a shift rpm of 6,000, the motor will spin to 6200ish before it shifts.

Make sure your valvetrain can handle it.

**l67ss** · 01-25-2014

^this

**Iceman6669** · 01-25-2014

Personally with the proper valve train setup I would run an XP setup to 6500 rpm.

**Scottydoggs** · 01-25-2014

how long will the timing chain last tho?

**Iceman6669** · 01-25-2014

With 105s should be ok.

**Scottydoggs** · 01-25-2014

anything over 6300 to 6500 scares me. what are you really gaining with the few more rpm's?

**Iceman6669** · 01-25-2014

An XP cam is a higher powerband cam. Revving up high is where that cam really makes good power.

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