3.5 v8 supercharge options

General Chat And Help Regarding Turbocharging and Supercharging.

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murray
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3.5 v8 supercharge options

Post by murray »

Good day all.
I have a mgb gt with stock V8 and a 4 barell holley carb. I have given some consideration to a supercharger. I think the Low compression standard 150hp 3.5 would do well with a boost.
I have seen a few on line but would like some advice from anyone who's stuck a charger on a similar engine. Pros and cons.
Many thanks.
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murray forbes-arnold
73 MGB GT V8
73 Triumph TR6
72 Mk1 Escort 2.1s
68 Moggie convertable

SuperV8
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Re: 3.5 v8 supercharge options

Post by SuperV8 »

I supercharged my 3.5 using a centrifugal supercharger, these can mount anywhere on the front as long as the pulleys line up.
I did find the V belt was unsuitable to transmit enough power without slipping though.
Even a modest boost pressure gave a good 'seat of pants' improvement.

the benefit of the centrifugal supercharger is it won't interfere with your bonnet, however to get the most out of any supercharger/turbo - fuel injection and mapable ignition are better than carbs and mechanical dizy.
Dax Rush 4.6 supercharged V8 MSII

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Blown v8
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Re: 3.5 v8 supercharge options

Post by Blown v8 »

My first supercharged rover was a 3.5 with Land Rover pistons, IIRC 8.5 compression, I had a Wade ro34 about 5-6 lbs of boost,
Certainly ran ok, but power ,especially boosted power is addictive, and before you know it,
You’re hooked, you have been warned 😎

murray
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Re: 3.5 v8 supercharge options

Post by murray »

So taking that its a standard spec 150hp engine. And assuming the engine is in good working order, would I get away with do little else. And would it pump through the holley
murray forbes-arnold
73 MGB GT V8
73 Triumph TR6
72 Mk1 Escort 2.1s
68 Moggie convertable

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Blown v8
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Re: 3.5 v8 supercharge options

Post by Blown v8 »

Yes, as long as you don’t have to much boost, get it on a rolling road to sort out the timing, (don’t ask me how I learnt the expensive way)
Put a grade cooler spark plug in, a boost referenced carb is best, but a good rolling road will sort it out (fatten it up) and make sure you’re ignition system is top notch

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Re: 3.5 v8 supercharge options

Post by Coops »

My 4.8 with a Procharger D1SC centrifugal supercharger fitted, for an idea
IMG_20201106_103822_321.jpg
IMG_20201027_215829_237.jpg
Regards Tony C (COOPS)
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MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

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