Engine/Transmission (1994 - 1998) Hit like a hammer bottom end torque?

[Nyoest]

I've been playing with my 96 to make some torque. So far I have a banks dual intake, wg elbow, 4,000 gsk, timing at 16*, pdr quick spool cam . Little of the fuel plate left, afc backed way off and the rack screw is in a good bit. So far every thing I've done has made plenty of horse but the bottom end take off seems to suffer. I turned the afc back to cut some of the low end fuel and it helped. But it's not enough. I've considered a tighter exhaust housing but my gets a high as is. Next major step is a turbo but that is a ways off.



A friend has a 97 that had stock injectors, original pump with custom plate and stock turbo that hit about 1,200 rpm and stayed in the cut till 2,700. He walked off and let me more than once. It's a straight up 13* to boot.



Is there that much difference in the pump cam profile to bring the power in at a lower rpm? Is the 3 * timing difference all of it ?



What mods have you done that brought in the bottom end torque? My thinking is if I start with more down low I'll be better off up top.

 

[Missouri Mule]

Nyoest, what trans do you have auto or manual? What trans does your friend have? If you have an auto did you have it built up ( after market)?

 

[Nyoest]

I've got a 5 spd and the buddy is running a 6spd. I also forgot to mention I'm running 4. 10s and he's 3. 55s. But it's down low where the big difference is. We do rolling starts so it's not really a holeshot.

 

[Missouri Mule]

I take it you grinded your plate down if so an aftermarket one mite do the job better. They ususally can tell you what it will do and if it is for racing or towing (TST,Banks,... ).

 

[Joseph Donnelly]

16 degrees of timing gives best power and mileage over about 2200 rpm, but 12-13 degrees is better for power and torque around 1400-1600 rpm.

 

[Nyoest]

Well I guess I'll just have to live with it then. At 60 mph I'm right at 2,000 rpm and that where I do most of my driving. Will stage 2 ddps and DVs afect the bottom end much?



Mr donnelly it would be a pleasure to meet you someday. I look forward to your articles every issue, keep up the outstanding work.

 

[Joseph Donnelly]

Bigger injectors than the 215 Hp you should have now will help a bit. I didn't get any improvement from delivery valves vs. the stock -181s.

 

[Nyoest]

I ended up putting an afc spent kit in. Wish it was the first mod I ever did. It comes in about 1,200-1,300 rpm compared to the previous 16-1700. Doesn't smoke much at all even towing heavy.

Now to rebuild the 5 speed... .....

 

[guldam]

What pray tell, is an AFC Spent Kit?



I have a 3k GSK, a Homemade #100 plate, etc. But I have no AFC Spent Kit that I know of.



GulDam

I ended up putting an afc spent kit in. Wish it was the first mod I ever did. It comes in about 1,200-1,300 rpm compared to the previous 16-1700. Doesn't smoke much at all even towing heavy.



Now to rebuild the 5 speed... .....

 

[GOlsen]

It might be worth looking to see if your governor arm is hanging up on the bottom of the plate.

PDR Diesel Inc. The turbo diesel performance specialists! - Lever Adj

 

[Nyoest]

What pray tell, is an AFC Spent Kit?



I have a 3k GSK, a Homemade #100 plate, etc. But I have no AFC Spent Kit that I know of.



GulDam

It was suppose to be afc spring kit, this stupid I phone fixed it for me.

I got it from ts performance for about $40. Well worth the money. Not a blow you away upgrade but much better than stock.



Ive checked the gov arm it's not my problem. My problem is I have champagne taste and beer money

 

[HEMI®Dart]

Nyoest, The simple answer may be (as it is in my case) the 5 speed trucks can't build any boost in the lower gears.





Throw me under the bus if you wish :-laf

 

[Nyoest]

Nyoest, The simple answer may be (as it is in my case) the 5 speed trucks can't build any boost in the lower gears.


Throw me under the bus if you wish :-laf

I won't chuck you under just yet... ... ... .

Originally this started out to try to get big block gas engine torque way down in the rpm. And to try to figure the difference between my buddies truck and mine. Mines a 96 5 spd 4. 10. His 97 6spd 3. 55. The timing plays a good part of it, also The pump cam profile is different and I think the taller gears help to load the engine to develop boost sooner. His also smokes like a mother, mine I wouldn't be scared to run in kalifornia.

I finally got it were I thought it was as good as it can get with out a wheelbarrow full of money. All told I spent about $65 and some time tinkering, it will eat a mustangs lunch like a fifth grade bully. Bigger injectors are in the works and I have my Vgt waiting for a manifold adapter and free time.

I appreciate everyones input, I was just reporting what worked for me.