Tricked-out Chevy six cylinder engines

[T2vigil]

I finally got around to checking the gas mileage and I was very pleased. 102 miles and used 5.46 gallons. Mind you it was never any faster than 55 MPH and never over 2500 RPMs. I guess that justifies my rebuild and I am very pleased.

[KroAutomotiveInc]

Originally Posted by T2vigil

I finally got around to checking the gas mileage and I was very pleased. 102 miles and used 5.46 gallons. Mind you it was never any faster than 55 MPH and never over 2500 RPMs. I guess that justifies my rebuild and I am very pleased.

thats great! what motor is it? my 230 runs 17-20 i've read recently the 250 and especially the 292 are nowhere close to the mpg a 230 can run.

[T2vigil]

The trick is on the inside. I had it bored over .040 and about .005 to .007 off of the top of the block to clean it up - rusty and about .020 off of the head for the same reason. I ported and polished the head installing a COMP Cam similar to the Mercury Marine cam. finally I used 307 pistons and they are flat top not dished like the 250s are.

[TJ's Chevy]

Originally Posted by KroAutomotiveInc

thats great! what motor is it? my 230 runs 17-20 i've read recently the 250 and especially the 292 are nowhere close to the mpg a 230 can run.

Your right about the 292 not gettin near the gas mileage, but when it comes to power look, out cause the 292 smokes them small block 6 cylinders. lol. The stock 292 gets around 15 mpg. When you hook it to a four barrel and ad headers then back it with a 5 speed some say you get around 18 mpg. Not bad, I mean that's better than my dad's 496 big block chevy( A woppin 8 mpg!)

[KroAutomotiveInc]

Originally Posted by T.J. MCCAULEY

Your right about the 292 not gettin near the gas mileage, but when it comes to power look, out cause the 292 smokes them small block 6 cylinders. lol. The stock 292 gets around 15 mpg. When you hook it to a four barrel and ad headers then back it with a 5 speed some say you get around 18 mpg. Not bad, I mean that's better than my dad's 496 big block chevy( A woppin 8 mpg!)

yeah for sure the inline 6's will always be better on gas compared to a v8 of any kinda my dad has a 3/4 ton dodge with a 440 that runs 7-8 mpg to lol do you know since the 230 and the 250 are basicly the same can a 230 be bored out to a 292 since a 250 could?

[KroAutomotiveInc]

thanks yeah all i know is just what i have learned messing around with my 230 never even seen a 292 in person lol.

[TJ's Chevy]

Originally Posted by KroAutomotiveInc

thanks yeah all i know is just what i have learned messing around with my 230 never even seen a 292 in person lol.

You can see two 292's at my house! The 230-292 share the same bore size of 3.875. The 292 has a stroke of 4.125 were as the 230 has a stroke of 3.250. That is quite a difference in size. The gmc 302 has a 4 inch bore and stoke making it the tallest deck 6 cylinder in the gm line. Why? It had 7 inch connecting rods! Thats long! Now think about the bore and stroke of a 900 cubic inch cummins diesel. Whew! Scary! If you were to bore a 230 .125 over it would go to a 245. Ad a .125 over stroke it( i think) would be around a 255. So it still has a long ways to go before it will catch up to the 292. The 292 has a pushrod cover size of 6 inches were as the 194-250 have four inch. Chevy would have been smarter if they did a bigger bore on the 292 instead of the long stroke. Put a gmc 302 up against the chevy 292 and i would bet money that 302 is gonna win every time. Also one more thing, the 292 has a connecting rod length of 6.700 so not to much smaller than the 302 gm.

[KroAutomotiveInc]

dude thanks for all the info great to know i will probably be rebuilding my 230 before to long and i want to beef her up a bit!

[TJ's Chevy]

Originally Posted by KroAutomotiveInc

dude thanks for all the info great to know i will probably be rebuilding my 230 before to long and i want to beef her up a bit!

If you want to know about beefing up a 230 I would recommend talking to vernski.

[Vernski]

Hey guys check out this link and see what you think, this has some info on lump porting..Vernski

http://12bolt.com/

[K5 Addiction]

Originally Posted by Vernski

Hey guys check out this link and see what you think, this has some info on lump porting..Vernski

http://12bolt.com/

Yep this is Tom Lowe's site & he's one of the top Inline guru's around. Built my motor.

[Vernski]

K-5 ADD what is the model # of your F.A.S.T. fuel injection setup? I was trying to check it out, they so make many different ones I was goingtrying to find maybe the right one thanks..Vernski

[K5 Addiction]

I'm not gonna wade into any of that mess except to say I've had nothing but good dealings with Tom & have never heard him claim to invent anything. He's a very solid & honest engine builder.

[Vernski]

Originally Posted by T.J. MCCAULEY

I am not out to hurt anybody who has used Tom L. for engine building. As for Tom, I just got upset when I saw the direct copies of these lumps. And I am not trying to create a mess.

T.J. If there were patents on the lump ports they will have to battle it out in court. If there were no patents it's a open field and free enterprise. Sometimes life is not as fair as we would like it to be, then acceptance is the key. Sorry what I posted got you upset it was FYI for all of us..

[Heater63]

Nothing but GREAT experiences with Tom. And I know of know other guy that would pool a bunch of guys and small donations together and spend days and days doing dyno comparisions of the 250 AND 292 in various trim.
Read the stuff on inliners and you will see Tom shares, is accurate with his info, and is courteous in doing so.

my 2 c.

[TJ's Chevy]

Originally Posted by Heater63

Nothing but GREAT experiences with Tom. And I know of know other guy that would pool a bunch of guys and small donations together and spend days and days doing dyno comparisions of the 250 AND 292 in various trim.
Read the stuff on inliners and you will see Tom shares, is accurate with his info, and is courteous in doing so.

my 2 c.

Glad to know you have had good experience with him. Accurate and courteous i can bear the witness. The only thing I was upset about was the copy of the lumps and i am not the only one.

[gimmy 64]

who do you think came up with the lump ports? is this something you know or some one tell you? I know Larry --- twisted Six has been selling them for along time but I don't think he was the original person to develop them he just started to make them and sell them . I think the idea was done along time ago by racers and never developed. so if you built a hand made blower manifold for a 235 chevy six and vick edelbrock started to manufacture one similar would you be pissed and never by edelbrock?

[sixtyeightchevykid]

went and talked to the best exhaust guy i know yesterday and he said he would love to do the exhaust on a six. im pretty excited. im going to be getting the langdons cast headers duals exiting behind the drivers rear tire. i have another question. i want to use studs in the head to hold the manifold and headers but i want to know what size the studs need to be the length is what im after. thanks

[Vernski]

Originally Posted by sixtyeightchevykid

went and talked to the best exhaust guy i know yesterday and he said he would love to do the exhaust on a six. im pretty excited. im going to be getting the langdons cast headers duals exiting behind the drivers rear tire. i have another question. i want to use studs in the head to hold the manifold and headers but i want to know what size the studs need to be the length is what im after. thanks

If your replacing the two alining pegs with studs mine were 2" in length seemed to be about right..Vernski

[JR25]

Happy Father's Day to all the fathers out there!
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[chevy_mike]

Not in my truck but just rebuilt this for my '64 Chevy II wagon. 250ci, Clifford intake and headers, Holley 390cfm carb, HEI.

[Vernski]

[quote=chevy_mike;6183904]Not in my truck but just rebuilt this for my '64 Chevy II wagon. 250ci, Clifford intake and headers, Holley 390cfm carb, HEI.

What is the bio on the valve covers? That looks sharp on there..Vernski

[TJ's Chevy]

Originally Posted by chevy_mike

Not in my truck but just rebuilt this for my '64 Chevy II wagon. 250ci, Clifford intake and headers, Holley 390cfm carb, HEI.

Very Nice!

[tkeduk8r]

thats an old mercruiser valve cover painted correct???
--Mike

[Vernski]

Originally Posted by tkeduk8r

thats an old mercruiser valve cover painted correct???
--Mike

That very well could be there must have been decals on the flat spots, but I'm not familiar with it looks like crinkle paint..Vernski