first gen engine vs. secend gen

mehrshadvr4 · #1 03-16-2006, 06:38 PM

is 91-93 vr4 engine as strong as 94+?is 500whp safe on 93 vr4 with stock engine.i was reading on 3si and i saw some thing about 2 bolt engine and 4 bolt engine.what the hell are those?

Stealthee · #2 03-16-2006, 07:16 PM

The 94 engine is stronger.... BUT Many have ran ungodly hp on stock internals with a 2 bolt. IPO made ~700hp on a 2 bolt NA block with stock TT pistons.

mehrshadvr4 · #3 03-16-2006, 08:51 PM

so 500whp is safe.right?i hope so,becase i need to make 470 to 480hp to the wheels with out blowing the engine.

AutostradaVR4 · #4 03-16-2006, 09:07 PM

Quote:

Originally Posted by mehrshadvr4

is 91-93 vr4 engine as strong as 94+?is 500whp safe on 93 vr4 with stock engine.i was reading on 3si and i saw some thing about 2 bolt engine and 4 bolt engine.what the hell are those?

93 vr4 is 4-bolt. What that is referring to in how many bolts are in the main bearing cap girdle. As of June 1992, mitsu produced all DOHC 6G72 engines with a 4-bolt main. If your not sure if yours is a 2 or 4, go here http://www.ypass.net/3s/story.php, enter your VIN, and check your production date. If its June 1992 or later, you have a 4-bolt.

mehrshadvr4 · #5 03-16-2006, 11:19 PM

good shit.my car made on the 1st week of August 1992.so my car is 4 bolt.thank a lot.

carguyvr4 · #6 03-23-2006, 08:05 PM

so a 4 bolt is better then a 2 bolt and the 4 bolt is in the 94 and up Motors? would there be a problem taking a 93 vr4 and putting a 94+ engine in it? would thre be complications?

AutostradaVR4 · #7 03-23-2006, 08:53 PM

Quote:

Originally Posted by carguyvr4

so a 4 bolt is better then a 2 bolt and the 4 bolt is in the 94 and up Motors? would there be a problem taking a 93 vr4 and putting a 94+ engine in it? would thre be complications?

as i said above, the 4-bolt is in the 93 and up DOHC motors only (SL and VR4). yes, the 4-bolt is better/stronger, but, like stealthee said, people have put out big numbers with the 2-bolt. Unless your using your car for racing purposes and such, i dont think its really worth an engine swap. As for the swap, as long as your not swapping trannys as well, there shouldnt be complications. May need to swap the ECUs...i believe they changed to hybrid in 1994???. But, now that you know a 93 vr4 engine is the same as a 94 vr4 engine, you probably arent interested in a swap anymore...

xXxRocker5150 · #8 03-23-2006, 08:53 PM

^lol, scroll up like 3 posts, 4 bolt was made after june of 92' man... IDK when they changed the ECUs or to the 25 spline tranny or the metal transfer case, or the adjustable cam gears or w.e. that adjustable thing was, but I think it was around the same time...

xXxRocker5150 · #9 03-23-2006, 08:54 PM

hahahah we posted at the same time, nice!

mehrshadvr4 · #10 03-23-2006, 08:55 PM

Quote:

Originally Posted by carguyvr4

so a 4 bolt is better then a 2 bolt and the 4 bolt is in the 94 and up Motors? would there be a problem taking a 93 vr4 and putting a 94+ engine in it? would thre be complications?

no . 93+ has 4 bolt wich is same as 94+ engine.just go to that web site to see your 93 vr4 is 2 bolt or 4 bolt like the other persone said.i went to that web site and i found out min is 4 bolt

mehrshadvr4 · #11 03-23-2006, 08:57 PM

Quote:

Originally Posted by mehrshadvr4

no . 93+ has 4 bolt which is same as 94+ engine.just go to that web site to see your 93 vr4 is 2 bolt or 4 bolt like the other persone said.i went to that web site and i found out min is 4 bolt

i ame realy happy that i have 4 bolt.

mehrshadvr4 · #12 03-23-2006, 08:57 PM

Quote:

Originally Posted by mehrshadvr4

no . 93+ has 4 bolt wich is same as 94+ engine.just go to that web site to see your 93 vr4 is 2 bolt or 4 bolt like the other persone said.i went to that web site and i found out min is 4 bolt

i am really happy that i have 4 bolt engine.

Igovert500 · #13 03-23-2006, 11:36 PM

That's nice, but we don't need to be told 3x.

Stealthee · #14 03-24-2006, 01:11 AM

The NA's were never 4 bolt. Only the TT's.

AutostradaVR4 · #15 03-24-2006, 07:51 AM

hmmm...got my info from here, 3rd paragraph down.

http://www.stealth316.com/2-2bolto4bolt.htm

"The DOHC 6G72 is an extremely strong engine, with an alloy steel block and aluminum alloy heads, and is capable of delivering well over 500 HP with turbocharging. As good as the first versions of the engine were, Mitsubishi decided to make the engine even stronger in 1993 models (starting with June 1992 production-date cars) giving it a 4-bolt main bearing cap girdle (the original used 2-bolt caps with stiffening stays on the middle 4 bolts) and a nitrided-steel crankshaft (the original was cast iron or mild steel). Mitsubishi made other changes, most significant of which was moving the crank and cam angle sensors from the left head (where it was user-adjustable for timing) and into the block (not adjustable)"

so theyre just referring to the TT DOHCs then?

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