GT350 kit question

[christianUK]

Nosing about on the CJs website I saw they were selling an adpator ring for the GT350 manifold to allow you to use a "no tune" 85mm (or even a stock 80mm) throttle body. Before I discount this as a daft idea, I was wondering if you could in theory use the stock GT air box and a 85mm throttle body to get most of the benefits of using the 350 manifold, but without having to cough up for an nGuage plus Lund tune as well.

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[Gibbo205]

Nosing about on the CJs website I saw they were selling an adpator ring for the GT350 manifold to allow you to use a "no tune" 85mm (or even a stock 80mm) throttle body. Before I discount this as a daft idea, I was wondering if you could in theory use the stock GT air box and a 85mm throttle body to get most of the benefits of using the 350 manifold, but without having to cough up for an nGuage plus tune as well.

The 350 manifold needs a tune, you cannot fit that manifold and not tune the car so you 100% have to cough up for a tune.

Though it would probably run and probably run reasonably OK with stock throttle body or a BBK one the car would never be 100% or getting the true potential from the manifold so it makes little sense as to why you'd do it.

For what it cost for the parts, you might as well just get a tune as you'd gain more from just a tune then you would from an un-tuned 350 manifold, plus fitting the kit un-tuned could have some risk.

 

[christianUK]

Well that answers that! Thanks very much Gibbo. Besides there are all the other benefits of a good tune as well to consider.

 

[Gibbo205]

Well that answers that! Thanks very much Gibbo. Besides there are all the other benefits of a good tune as well to consider.

A tune does the following:

- Improves throttle response by adjusting driver demand tables, this effects normal, sport and race mode throttle response, you can request the tuner to leave stock or tweak or more or less depending on your preference
- Torque limiters: A good tuner again reduces these, so the issue that many people notice is if you floor the car in 3rd gear off a corner say at 2000rpm it sometimes feel like the throttle has not fully opened. Well this is indeed the case, the ECU has limited power by not allowing the throttle body to fully open. A tune will reduce this or even disable it completely if you request, which means at certain points on throttle tip in you could be 50HP by simply getting the full power the car came with.
- Power wise, a tune by itself will deliver a real world 15-30HP and around 40lb/ft additional power.
- You can also request some from some tuners to disable stuff like rev hang, enable no lift shift strategy etc.
- On auto the tune can firm up and speed up shifting to make it more sporty etc.


As you can see a tune gives so much, the best way to go about it is:

- Buy an USA SCT X4 from Ebay, (£250-£300 delivered). Make sure its a 7015 and USA one (Black in colour). A UK handheld will not work with a US tuner such as Lund, AED, JDM etc.
- Then buy the tune direct from say Lund for $200, no shipping or tax as it comes via email. ;)

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