I know that my question is very reduntant but I need to ask it .I pull a trailer and want a little more tow po1wer. 1998 k 3500 454 auto 4:10 Dually..What on earth can I do to get more out of my truck..without mortgaging the house. I have been watching lots of posts and things get carried away very quickly about getting big big hp.
Gettingn very confused over nwhat to do with this information.
We are looking for extra HP/Torque to tow with our dually.ECM mod -Cam-Reworked heads TBI changes ??
Just need to know what works .I realize there is a cost for everything but a pension will only allow for so much..
Would converting to an 8.1 be of hp benefit in favour of tow power
I
( kenneth a hiebert, 03/07/2020 )
Best, least expensive way to get more power out of this engine is with our custom tune. All other modifications are going to be expensive, labor intensive and still not necessarily yield the same results. Another popular upgrade is changing to Bosch 4 hole injectors.
I am doing a full engine swap from a damaged motorhome to my older motorhome. I have a 2000 7.4 engine transmission and full wire harness and ECM from one motorhome and want to put it in my 1995 motorhome. I don’t have the 2000 VIN only the VIN from my 1995. Can you tune my new 2000 ECM and will it work without the original key and ignition harness.
( Rick, 03/01/2020 )
We can tune the 2000 ECM for that engine and I'm pretty sure the ignition harness on that vehicle has no tie in with the ECM. I'm sure there are other differences that would need to be addressed but you should still be able to re-use the original key and ignition harness.
Do you folks know of cam upgrades along with tuning that would give power upgrades on a l21 with a manual transmission ?
( Jerry weeks, 02/12/2020 )
We are unaware of any cam upgrades specifically for the L21. That said, the main internal differences between the L29 and L21 is that the L21 has forged pistons and crankshaft. You might be able to run an L29 cam, but you will need to consult an engine builder. We can tune it if you can build it :)
Fuel pump doesn't run. I straight wired it to test it and it will run. I replaced the relay to no avail. At the relay the Orange wire is hot with 12 volts continually. The Gray, the green with white strip and the black test grounded. There is a small red wire that has never been connected to anything. The batteries are fully charged and there is 12 volts to the distributor. I sprayed starter fluid in the tbi and it fired up for a few second.
What should I try?
( Bo Walker, 02/12/2020 )
Having tried the things you already have, I am pretty confident the issue is the PCM. We’ve seen a few 1996-1997 PCM’s with this issue.
Is it worth tuning a black box or worth changing to 411, I have headers ,cat delete, 19.5 five 0 injectors, and Pulling cam swap. I have the 411.
( Kenneth, 12/30/2019 )
We tune the original black box PCM but do not do the 411 swap.