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2nd gen. head

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2nd gen. head

Postby Mike T. » Tue Dec 04, 2007 5:00 pm

I've heard that 94-97 12 valve heads flow better. Just wondering if there would be any issues putting one on a 1st gen. I'm also wondering why they flow better.

Thanks
Mike
93 w350 ext. cab,auto,354s,4"exh., smokey mt.,bhaf,htb2 62/65/12,CoolerTubz, ddp 55lpm inj.,Timed 1/8,Valet Switch,Piston LP,mild pump,3200 spring,ddp pin,Goerend TC,25k gvw trans cooler, deep pan,gauges,egt is pre.
Mike T.
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Postby ford69557ci » Tue Dec 04, 2007 5:54 pm

i thought they were the same besides the 91.5 and lower havin the 9mm injectors vs 7mm?
92 w250, NV4500, D80, maxed pump, AFC gone, extended fuel screw, more to come.
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ford69557ci
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Postby Mike T. » Tue Dec 04, 2007 5:58 pm

ford69557ci wrote:i thought they were the same besides the 91.5 and lower havin the 9mm injectors vs 7mm?


I don't really know if it's true, it was something I'd heard and I thought maybe someone would know for sure.

Mike
93 w350 ext. cab,auto,354s,4"exh., smokey mt.,bhaf,htb2 62/65/12,CoolerTubz, ddp 55lpm inj.,Timed 1/8,Valet Switch,Piston LP,mild pump,3200 spring,ddp pin,Goerend TC,25k gvw trans cooler, deep pan,gauges,egt is pre.
Mike T.
fuel screw!!!!
 
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Postby GLHS » Tue Dec 04, 2007 6:02 pm

From what I've heard/read, about 4-5% more. That would be 6-7 cfm.
92 W250 ext cab, 5spd, SPS 62/71/14, ATS 3 piece, Banks 3G intake, Icebox CAI, DDP #4+, timing 1.95 mm, SB 4 puck FE, PDR fuel pin, Hellmann intercooler, Snow water/meth, 60# springs, stock long block, D80 3.54 w/disks, 455+/1005 uncorrected, 13.34@102 7-06; 472 fuel/520 water/meth uncorrected 5-08
GLHS
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Postby Mike T. » Tue Dec 04, 2007 6:10 pm

GLHS wrote:From what I've heard/read, about 4-5% more. That would be 6-7 cfm.


Thanks GLHS
Mike
93 w350 ext. cab,auto,354s,4"exh., smokey mt.,bhaf,htb2 62/65/12,CoolerTubz, ddp 55lpm inj.,Timed 1/8,Valet Switch,Piston LP,mild pump,3200 spring,ddp pin,Goerend TC,25k gvw trans cooler, deep pan,gauges,egt is pre.
Mike T.
fuel screw!!!!
 
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Postby flashgordon » Tue Dec 04, 2007 6:30 pm

Mike T. wrote:
GLHS wrote:From what I've heard/read, about 4-5% more. That would be 6-7 cfm.


Thanks GLHS
Mike


So if some one, with a non intercooled (9mm) developed a failing cracked head..............It might be wiser to search for a 2nt gen, 12v head instead of intercooled (7mm) first gen head?????????????????

What else would be different. Combustion chamber CC would be the same between the two........FLAT(0 cc) :lol:

Is the head gasket the same between the two.......................


Flash.
91.0 non intercooled 3/4 ton 5sd ex.straight piped 16cm housing, timing bumped 1/16...Pump . Full power screw1/2 max with out removing the collar. Gear Vender over drive!
"NOW" with 2nt gen intercooler, turbo and 3"Coolertubz, Buy Tim (TWorline)"
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Postby ford69557ci » Tue Dec 04, 2007 7:17 pm

yes it would be a wise upgrade and yes the head gasket is the same
92 w250, NV4500, D80, maxed pump, AFC gone, extended fuel screw, more to come.
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Postby gear jammer 91" » Mon Dec 17, 2007 9:40 pm

Now all I need is my head to crack so I have an excuse to buy a better flowing head, bigger injectors, arp head studs, and a cometic head gasket. ( and some money to pay for all that stuff) :lol:
Sold 91 now-intercooled W250, 388WHP 923WTQ on #2 only 423WHP 968WTQ on meth 0% correction.
01 LB7
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Postby rbrettctd » Mon Dec 17, 2007 9:45 pm

Ya know...they make sleeves to use upgraded injectors in our heads. :thumright:

Im not even waiting though... As soon as I find the right deal on a head Im gonna start gathering it, studs, gasket, etc. Id like to see what my truck is capable of lol. I know of 48lbs of boost available.
Randy
1991 D-250 N/I CTD. POD's, , BHAF and unger custom intake /crossover, HX35/16, 4" exhaust to 6" tip, Custom ground pin. Isspro gauges on pillar. Now Getrag equipped, SB crap clutch (12") and 3.07 gears-ready to watch the mileage soar.
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Postby dpuckett » Tue Dec 18, 2007 11:28 am

Randy -be careful with 48psi if you still have the original old style head gasket- it isnt known for lingevity past about 30-35psi.

I had a crack in my head on my nonIC 91. Guy at the machine shop said he had seen guys run cracks twice the size of mine in Case loaders and such with no issues, so I ran mine as it was. As long as oil, water, and cumbustion gasses stay where they belong......

DP
His- 93 W250 club cab LE, auto to Getrag conversion, piston lift pump, 3.54 LSD. 400k+
Hers- 04 QC 4x4. Built auto, Triple Dog, Air Dog. Funny Round truck that aint so quiet.
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Postby rbrettctd » Tue Dec 18, 2007 11:31 am

dpuckett wrote:Randy -be careful with 48psi if you still have the original old style head gasket- it isnt known for lingevity past about 30-35psi.

I had a crack in my head on my nonIC 91. Guy at the machine shop said he had seen guys run cracks twice the size of mine in Case loaders and such with no issues, so I ran mine as it was. As long as oil, water, and cumbustion gasses stay where they belong......

DP


I ran it to 48 once and my jaw dropped when i saw that. Its gated to 40 now, gonna get it to 36 or so when I upgrade it and everything. Intercooling should help drop that figure a little too.
Randy
1991 D-250 N/I CTD. POD's, , BHAF and unger custom intake /crossover, HX35/16, 4" exhaust to 6" tip, Custom ground pin. Isspro gauges on pillar. Now Getrag equipped, SB crap clutch (12") and 3.07 gears-ready to watch the mileage soar.
rbrettctd
fuel screw!!!!
 
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Postby ford69557ci » Wed Dec 19, 2007 11:22 pm

i finally popped my gasket the other day 60psi on bottle and it was done
92 w250, NV4500, D80, maxed pump, AFC gone, extended fuel screw, more to come.
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