finalymodded

what is ci of 6.0l block with no extra bore (except what is necessary with new piston), and a 4" or 4.125" stroke?

<img border="0" alt="[gruffy cottonball]" title="" src="graemlins/gr_gruffy.gif" />

Paul F

iTrader: (2)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by bone camaro:
<strong> what is ci of 6.0l block with no extra bore (except what is necessary with new piston), and a 4" or 4.125" stroke?

<img border="0" alt="[gruffy cottonball]" title="" src="graemlins/gr_gruffy.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">4.030 bore X 4.00" stoke = 408.18

4.030 bore X 4.125" stroke = 420.93

finalymodded

Thank you was looking for the calculation.


<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> To the people who look out on this

site!

BTL FED

iTrader: (9)

Displacment Calculator
http://www.aera.org/tech/cube_calc.html <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Where is a good place to find these cranks, I guess lunati is the only company making them now? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

Pro Stock John

iTrader: (34)

You might want to plan a .020 or .030 overbore for the iron block so you can access a good piston from Diamond etc.

I had a 4.060 bore x 4.075 stroke iron block and did 475rwhp/505rwtq.

gillbot

iTrader: (27)

What is the max bore the 6.0L block can take?

Chicago Crew UnderBoss

iTrader: (1)

Biggest bore you can go safely with (ON all Motor only engines) is what MTI is building for me know and that is 4.060 overbore. WIth the 4.060 overbore the block should be sonic tested for proper cylinder wall thickness. Some even stretch (all motor) 6.0 liter engines to 4.080, but that is REALLY pushing it in my opinion.

If your going to spray the gas or do other F/I go no bigger than 4.030 overbore.

Hope this helps.

MTI 427 C5 Roadster

<small>[ January 31, 2003, 07:05 PM: Message edited by: MTI 427 C5 Roadster ]</small>

gillbot

iTrader: (27)

I was just wondering, My side project may become a 427CI <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> I just hope the wife doesn't find out! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MTI 427 C5 Roadster:
<strong> Biggest bore you can go safely with (ON all Motor only engines) is what MTI is building for me know and that is 4.060 overbore. WIth the 4.060 overbore the block should be sonic tested for proper cylinder wall thickness. Some even it stretch all motor 6.0 liters to 4.080 but that is REALLY pushing it in my opinion.

If your going to spray the gas or do other F/I go no bigger than 4.030 overbore.

Hope this helps.

MTI 427 C5 Roadster </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">

Chicago Crew UnderBoss

iTrader: (1)

Also, another HUGE reason to stick with the more conservative 4.030 bore, probably used by a majority of big bore LQ4 motors, is the fact that there will enough cylinder wall material lift to rebuild the engine, vs. the 4.060 bore that i am doing, most likely would not have enough material left if i ever rebuild this motor, thus forcing me to get a brand new block with new machining for rebuild or having to resleeve one or more cylinders.

MTI 427 C5 Roadster

cgfirehawk

iTrader: (2)

MTI 427 C5 Roadster, you don't think it would be safe to spray on top of a 4.06 bore on the iron block. I am wondering cause I was gonna do the same block with a dual stage nitrous setup on it.

gillbot

iTrader: (27)

What is the max stroke you can do on the 6.0L?

Pro Stock John

iTrader: (34)

Max realistically is 4.125.

I will say this.

I would not really go over 4.125 ever.

I think 4.125 is good for bragging rights but realistically I would personally not go over 4.000 stroke.

gillbot

iTrader: (27)

Hrm.... I guess I'll abandon the 427 idea and go the easier (cheaper <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> ) route. 4.030 bore x 4 stroke

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> Max realistically is 4.125.

I will say this.

I would not really go over 4.125 ever.

I think 4.125 is good for bragging rights but realistically I would personally not go over 4.000 stroke. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">

Chicago Crew UnderBoss

iTrader: (1)

CGFirehawk:

I'm no mechanic or expert but just based on what I have heard on this forum, most would agree that if you are planning to do any significant amount of spraying the GAS, that 4.030 is the max bore you could safely run and have a bullet proof motor build for mega N20.

However, top expert LS1 engine builder, Jayson at MTI, has told me that if i ever wanted to ocassionally spray a conservative 100 to 150 shot on my 4.060 6.0 liter overbore, that i should be fine. He would know, not me! However, if you are going to ever do a 4.060 overbore of the 6 liter ironblock, no matter if you intend to stay N/A like me, or if you plan on N20, you must have the block sonic tested to make sure there is enough cylinder wall thickness to do a 4.060 bore, as i have been told this by several prof. SBC engine builders.

MTI 427 C5 Roadster

cgfirehawk

iTrader: (2)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MTI 427 C5 Roadster:
<strong> CGFirehawk:

I'm no mechanic or expert but just based on what I have heard on this forum, most would agree that if you are planning to do any significant amount of spraying the GAS, that 4.030 is the max bore you could safely run and have a bullet proof motor build for mega N20.

However, top expert LS1 engine builder, Jayson at MTI, has told me that if i ever wanted to ocassionally spray a conservative 100 to 150 shot on my 4.060 6.0 liter overbore, that i should be fine. He would know, not me! However, if you are going to ever do a 4.060 overbore of the 6 liter ironblock, no matter if you intend to stay N/A like me, or if you plan on N20, you must have the block sonic tested to make sure there is enough cylinder wall thickness to do a 4.060 bore, as i have been told this by several prof. SBC engine builders.

MTI 427 C5 Roadster </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Cool, I was just asking what your opinion was. Just trying to get an idea of what I'm gonna do and I value the opinion of all the people on this board. If I do spray then it may not be more than a 150 to 200 shot, but if I plan on going any higher than I will probably stay safe with the 4.030 bore. Thanks for your help! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

OBTW what kind of HP you think the 4.60x4.0 package will make with all the other normal boltons?

<small>[ February 04, 2003, 04:45 PM: Message edited by: cgfirehawk ]</small>

Chicago Crew UnderBoss

iTrader: (1)

I think the 4.060 overbore and 4.00 crank is a perfect set up which comes to 414 CID, and if matched with a ballsy cam like MTIs S1 that i will be running in my 427 (244/244, .612 lift and a 112lsa)and of course the best stage III LS6 heads that $ can buy, then you should be good for 480 to 500 RWHP thru an M6, with 11:25 to 1 compression and of course with no cats and custom 3 inch exhaust.

I serioulsy struggled whether to use the 4.00 crank instead of my 4.125 choosen crank for my 4.060 bore, but based on a couple valued opinions from expert SBC builders i opted for the larger crank which will yield me 427 Beautiful cubic inches. My set up will be a TORQUE MONSTER no doubt and i expect close to 480rwhp thru 3 inch exhaust and no cats and about 500rwtq, thru my A4 with 4000 stall. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> Of course, i will post my dyno results when MTI is done with my motor in just SEVERAL MORE WEEKS! <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" /> <img border="0" alt="[driving]" title="" src="graemlins/gr_driving3.gif" />

MTI 427 C5 Roadster