Can you cam a TBI?

You can cam an LQ4, dump on a set of headers and make a very mild drivable engine that is 400 Hp and similar torque, or more depending on what you want to live with. Good luck even getting a TBI 350 to ever run and produce that much power. It’s been done, sure. Usually a 383 or 400 would be used though.

How much power can a TBI 350 handle?

The 350 TBIs only flow like 475 cfm, but can be bored to flow ~650 cfm. The bored TBI with the bigger injectors (96 lbs), the right chip, and a bumped up fuel pump (20 psi), should be able to support 345 hp (according to John’s calculations).

How can I get more power out of my 5.7 TBI?

How to Get More Horsepower for the 1994 GMC 5.7 Liter TBI

  1. Fill up your vehicle with high octane fuel rated above 90 octane.
  2. Add fuel injector or carburetor cleaner to your vehicle’s gas tank every 3,000 miles.
  3. Install a cold air intake on your vehicle’s air intake manifold.

What is a 350 TBI?

This engine was designed as a direct replacement for 1987-1995 Chevy & GMC pickups, SUV’s, and van applications. These vehicles featured a 350 ci, 5.7 Small Block Chevy with TBI (throttle body injected) EFI system, and swirl port heads.

Are TBI heads good?

TBI heads are often talked down by people who are too lazy and/or ignorant to learn otherwise, don’t let it fool you though, they’re a very good stock casting. They outflow most production casting SBC heads on the exuast side, and they don’t lag too far behind on the intake side.

Can you put a flat tappet cam in a roller block?

Flat-tappet cam lobes are ground at a very slight angle to prevent the cam from moving. Roller cams cannot be machined this way, so a roller-cam button is employed to limit cam movement. The spec for this is 0.003 to 0.005 inch.

What’s the difference between TBI and vortec?

The differences between them are that the TBI had the injectors right in front of the throttle plate, where the Vortec placed the injectors behind the throttle plate; and the TBI was a speed density system, whereas the Vortec used a mass airflow system to manage the fuel-injection system.

What should the cam be on a TBI truck?

If you look at a factory GM cam, the lobe seperation on the computer cars is usually 114 or higher, mostly due to the MAP sensor’s desire for an optimum vacuum number. You can step slightly out of bounds when choosing a cam for a TBI, but you have to be careful.

How does a high performance TBI engine work?

Install the map sensor upgrade from the speed shop to provide the increased fuel flow needed for a high performance TBI engine. Throttle body injection relies on MAP sensors for fuel control. It measures atmospheric pressure as opposed to vacuum in the manifold.

What are the specs for a TBI crate engine?

4. The cam in the TBI engine is just plain AWFUL. Specs on Stock TBI cam is .050″ tappet lift (intake/exhaust) is 165/175; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is .382/.402. I got those specs right off the Jegs website selling the new GM replacement TBI crate engines.

How to order a 350 TBI Chevy performance engine?

Here you can see the 350 TBI engine specs, shipping info, and more! Instant quotes: (888) 957-5454 For optimum service and purchase accuracy all quotes and orders are completed by phone. You can reach by phone at 1-888-957-5454 or email at [email protected]!

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