[JJR11]

j

[s346k]

if you don't plan on racing it, i wouldn't bother. making the msd useful requires 6700+ rpm.

[LT1ornothing]

MSD manifold and 103mm TB like to be paired with heads and cam. Have you looked into the LT2 manifold with LT5 TB? Much cheaper than MSD and will give a good power bump on a bolt on car.

[Spaceme1117]

Best bang for the buck is a modified LT2 intake manifold. And if the GPI you are referring to is Gwatney Performance, they sell an already modified LT2 intake with everything you need to bolt it on. Keep your stock throttle body.

[Wintermute]

Anything more than a ported stock throttle body is a waste of money unless your adding boost.

[LT1ornothing]

Originally Posted by Wintermute

Anything more than a ported stock throttle body is a waste of money unless your adding boost.

This is completely incorrect. A heads and cam naturally aspirated package benefits tremendously from a 103mm TB and MSD manifold combo or a high ram and 103mm TB combo.

[s346k]

my bolt on car definitely picked up power/mph from an msd. went from LT2/stock tb to ported msd/LT5 tb.

hands down the best bang for your buck is a stock LT2 manifold with a stock tb. i bought a manifold and had it on the car for less than $300. after that you quickly enter the realm of diminishing returns and you're spending $1000/mph.

bear in mind that neither manifold is worth anything if you're not revving the car out.

[Wintermute]

Originally Posted by 1LEornothing

This is completely incorrect. A heads and cam naturally aspirated package benefits tremendously from a 103mm TB and MSD manifold combo or a high ram and 103mm TB combo.

Ugh, ok, yes if you want drop several grand into your heads and cam, the throttle body is worth it too lol.

My point is that a 103 is not worth the money until you dropped a lot money into other area. People seem to want to drop in a 103 or 95 first thing because it's relatively cheap and easy.

[NYblack1le]

Originally Posted by Wintermute

Ugh, ok, yes if you want drop several grand into your heads and cam, the throttle body is worth it too lol.

My point is that a 103 is not worth the money until you dropped a lot money into other area. People seem to want to drop in a 103 or 95 first thing because it's relatively cheap and easy.

Fastest bolt on cars run a high ram and a 103/95. Heads/cam will benefit more from it obviously but it doesn’t mean bolt on cars don’t. At the end of the day everything comes down to how deep you’re pockets are. If you don’t mind spending the money go with a 103/95 and the msd over the lt2. And if you wanna go even further have the msd ported.

[Katech_Zach]

MSD + 103 is great. We commonly pick up 30rwhp on 93 octane with an msd, 103, rotofab, 160 thermostat, and retune. Its hard to say what youd pick up since you already have a tune + headers, but it would probably be an extra 20 or so.

A better bang for the buck is the LT2 + 95mm throttlebody, the 95 is just a bit trickier to tune. It is the same as the MSD intake up until 6200~6500~, the MSD picks up 5~ hp more up top.

[laynlo15]

I've run all these combos except the Hi Ram either on my C7 or my new 2022 Lt1. On, my C7 I had a ported Lt1 IM and ported 87mm TB. We went 11.00@125, went to a ported MSD and ported 95mm TB. Went to the dyno and picked up some hp but lost torque. Went to the track and ran slower. Continued to make changes in the tune, raised the rpm on the shifts and worked on making sure the car didn't shift into 5 gear and finally ran 10.90@128 and ran 131 in SCT events. On my Lt1 Camaro only picked up 6 rwhp going from the Lt1 and 87mm tb to a ported Lt2 IM and 95mm TB, as I've said in the past don't worry about what the dyno says, it picked up a 1.4 tenths from 11.78@120 to 11.64@120. Most all was picked up in the 60ft and 1/8 mile from 7.64 to 7.53 and 60ft from 1.78 to a 1.72
Cost wise the ported Lt2 and 95 mm tb are the best for the buck. Get a good tuner and you'll be very happy.

[Kerry]

On the same kind of note I have heard that if you are blowing through the manifold and throttle body ie procharged that their is really no gains going from lt1 to lt4 and msd unless u want to spin 7000 or so for the msd? Whats everyone's take on that?

Im set at 6500 for charger speed.

[Aaron07]

Originally Posted by Katech_Zach

MSD + 103 is great. We commonly pick up 30rwhp on 93 octane with an msd, 103, rotofab, 160 thermostat, and retune. Its hard to say what youd pick up since you already have a tune + headers, but it would probably be an extra 20 or so.

A better bang for the buck is the LT2 + 95mm throttlebody, the 95 is just a bit trickier to tune. It is the same as the MSD intake up until 6200~6500~, the MSD picks up 5~ hp more up top.

That is the combo I have, ported LT2 + ported 95mm. Why is the 95mm trickier to tune then the 103?

[laynlo15]

Originally Posted by Aaron07

That is the combo I have, ported LT2 + ported 95mm. Why is the 95mm trickier to tune then the 103?

Not sure that's true, I've had a few 95MM TB and basically your just re-scaling the MAF, I've never had any issues with that. I'm running one on my 2300 Maggie and thpsi Port Injection that I ran NA on this car. Ran one on my 2016 C7 with Ported MSD. No issues.