The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Opinions on running 35s with tbi 454/th400?

dieseldawg142 · 04-13-2013, 12:02 AM

you would think a 454 should have no problems with 3:73's & 35's. my blazer had a 400sb, 3:73's, & 35's. was'ent a speed demon, but was'ent no slouch either. my crew (also 454,T400) has 38.5's with 4:56's, great off the line, but horrible on the freeway. i would stay with the 3:73's, if it drops your powerband too much, try 4:10's. would'nt go lower than that with the T400, kiss away any fuel mileage you think your getting!

04-13-2013, 12:02 AM	#3
dieseldawg142 Registered User Join Date: Jul 2011 Location: back 40, bc Posts: 3,922	Re: Opinions on running 35s with tbi 454/th400? you would think a 454 should have no problems with 3:73's & 35's. my blazer had a 400sb, 3:73's, & 35's. was'ent a speed demon, but was'ent no slouch either. my crew (also 454,T400) has 38.5's with 4:56's, great off the line, but horrible on the freeway. i would stay with the 3:73's, if it drops your powerband too much, try 4:10's. would'nt go lower than that with the T400, kiss away any fuel mileage you think your getting!