How many guy running 4.1, and how they running?
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sixgun86gn
six offender
- Joined
- Feb 10, 2002
- Messages
- 3,470
I took my new 4.1 combo out last weekend and at 17# and 19* timing it did a best of 7.66 with a 1.66 60' and 89.7 mph in the 1/8.
The tune was real rich according to the wideband couldn't get A/F any higher than 10.9 : 1.
Drove it there after filling up with 93 gas and didn't even let air out of the tires. With some tuning and a better 60' I see 7.30's on 93 gas @17#.
The cam is different from my last combo and it spools real fast making the launch a little different. Here is the setup.
4.1 .030 w/ hypers
214/224 flat tappet
champion irons
6776 turbo
3200 stall
G body SLIC
RJC powerplate
4" mega maf
extender chip and 60# mototrons
stock doghouse and TB
stock headers
2.5 " exhaust
THDP
stock rocker arms
Pretty straight forward combo,no alky.
My old setup had a 218/218,ATR headers,70mm TB,83#ers as the only differences,oh and some old forged pistons I bought used.
The tune was real rich according to the wideband couldn't get A/F any higher than 10.9 : 1.
Drove it there after filling up with 93 gas and didn't even let air out of the tires. With some tuning and a better 60' I see 7.30's on 93 gas @17#.
The cam is different from my last combo and it spools real fast making the launch a little different. Here is the setup.
4.1 .030 w/ hypers
214/224 flat tappet
champion irons
6776 turbo
3200 stall
G body SLIC
RJC powerplate
4" mega maf
extender chip and 60# mototrons
stock doghouse and TB
stock headers
2.5 " exhaust
THDP
stock rocker arms
Pretty straight forward combo,no alky.
My old setup had a 218/218,ATR headers,70mm TB,83#ers as the only differences,oh and some old forged pistons I bought used.
Just got mine on the street this week (only 10 miles on engine). My build includes:
- 109 block bored 20 thou,
- Forged Stroker Crank
- RJC Girdle
- Forged rods
- Ported GN1 alum heads
- Roller cam
- Roller Rockers
- Ported Intake
- 72 mm TB
- PT-67 DBB Turbo
- 72# Injectors
- PTE FMIC
- Dual 2.5” ATR Exhaust
- Built Trans
- 3200 Stall TC
Hoping to get into the high 13’s. What do you time of my chances?
- 109 block bored 20 thou,
- Forged Stroker Crank
- RJC Girdle
- Forged rods
- Ported GN1 alum heads
- Roller cam
- Roller Rockers
- Ported Intake
- 72 mm TB
- PT-67 DBB Turbo
- 72# Injectors
- PTE FMIC
- Dual 2.5” ATR Exhaust
- Built Trans
- 3200 Stall TC
Hoping to get into the high 13’s. What do you time of my chances?
sixgun86gn
six offender
- Joined
- Feb 10, 2002
- Messages
- 3,470
Yeah with like 5# of boost on that combo!
This is for 4.1 production blocks, but your combo should fly
- Joined
- Nov 24, 2001
- Messages
- 11,267
I have been sadly mistaken for this comment, i will try and blame it on my kids, but anyway the time that ive posted is not true, i had a mix up, but will post more info soon, THX!
Got mine running a couple weeks ago and should be hitting the dyno on Saturday so Otto can do his magic.
Previously went 10.30@ 131
Old:
4.1 production block, stock crank and rods with custom pistons. Champion untouched aluminum heads and intake. T-72.
Now:
Same block, stroker crank and rods with custom pistons. Ported the heads and intake. T-76.
Shooting for 9's of course.
Previously went 10.30@ 131
Old:
4.1 production block, stock crank and rods with custom pistons. Champion untouched aluminum heads and intake. T-72.
Now:
Same block, stroker crank and rods with custom pistons. Ported the heads and intake. T-76.
Shooting for 9's of course.
Breaking news!!! I just learned, if anyone dont know besides me, if you are swaping in a roller cam, be sure to get the right front cam bearing, my engine wasn't pumping oil to the lifters on the driver side, i was just told you have to get a bearing from TA per that has a grove in it to let oil come to the driver side lifters!!!
Installed Front Cam bearing, and oiling problem solved. This engine is a beast!! The cam, and turbo seems to be as a stock set up, engine spools instant! I see that the cam sensor makes a big difference to me!! Had to advance mine just a hair!
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