hx35w turboed 6.5's...how much power?

[kyle41005]

ive read a few things where guys have thrown in 18:1 pistons and a hx35w and made "much better" power... has anyone who has done this ever dynoed their truck??? just wondering what kind of power gains something like that would yield

[More Power]

Once you've added a higher-flow turbo, the limit to power becomes fuel... The DB/DS has a theoretical upper fueling limit (about 88mm3 at 2000-rpm), which can push the 6.5 to about the mid 220-250 uncorrected rear-wheel range. The fuel-rate curve peaks at 2000-rpm and tapers off as rpms climb. You've got quite a bit less fuel at 3000-rpm. This is one of the key benefits of a marine DB2. Its fuel-rate curve is designed to deliver more fuel at the working engine rpm used in a marine application.

With a stock on-road fuel injection pump, you'll need propane (fuel) to get above 300RW. I'd hesitate recommending this unless you've got a P400, which is factory rated at 250FW by AM General.

One of the more immediately noticeable benefits of a more free-flowing turbo is engine temperature, while being pushed, especially at higher engine speeds.

Jim

[HH]

One of the more immediately noticeable benefits of a more free-flowing turbo is engine temperature, while being pushed, especially at higher engine speeds.

Jim

Would that be true gong from a GM-3 to a GM-8? I just picked up a new GM-8 for the 1993.

[daustin]

I did that swap last year, the -8 seems to build boost quicker and keeps it going longer with a little lower IAT. I"ve been happy with the swap on my '93truck.
Don

[More Power]

Would that be true gong from a GM-3 to a GM-8? I just picked up a new GM-8 for the 1993.

Moving up to a GM-8 is a step in the right direction - by just a little. It's still too restrictive for a modded 6.5, and especially for one run with additional power at higher engine rpms.

The GM-series of turbochargers were really designed for the average (at the time - early 90's) diesel pickup owner who operated at stock power. It spools fast and delivers great driveability at modest power levels. :)

Jim

[6.5 Detroit Diesel]

So, what are some good turbo's that would bolt up and build boost fast without helping heat the engine to much? I intend to look for one in the spring along with an ARP head stud setup.