The biggest power gain on 91 oct?

Rcampos04 · Jun 20, 2017

Hello,

Currently checking whats the most whp I can get with only 91 oct (no meth, no nothing). Currently Lund tuned, looking for bolt ons and even checking between Vargas stage 2+ and Map turbo kits.

However my question is, whats my limit even with this turbo kits on 91 oct?

Thanks in advance just want to know if its worth to throw money at it

Glenn G · Jun 20, 2017

Honestly on 91, you will be in dangerous territory before you hit the limit of the stock turbo, Octane is the major limiting factor on these motors and they are sensitive to knock. Most upgraded turbos can only fet you about 30 whp or so over the stocker on 93 before you hit the octane limit on 93.

The short story is that if you don't have easy access to 93 or the ability to make E30 by mixing 91 and E85, there is little to gain from an upgraded turbo except the weight reduction of your wallet.

Rcampos04 · Jun 20, 2017

Glenn G said:
Honestly on 91, you will be in dangerous territory before you hit the limit of the stock turbo, Octane is the major limiting factor on these motors and they are sensitive to knock. Most upgraded turbos can only fet you about 30 whp or so over the stocker on 93 before you hit the octane limit on 93.

The short story is that if you don't have easy access to 93 or the ability to make E30 by mixing 91 and E85, there is little to gain from an upgraded turbo except the weight reduction of your wallet.

Hi,

thanks for your reply on this

I see.. umm then with the stock turbo how much whp can I put?

metalhead79 · Jun 20, 2017

I believe 91 octane normally sees around 300whp with full bolt-ons.

smdandb2 · Jun 20, 2017

Glenn G said:
The short story is that if you don't have easy access to 93 or the ability to make E30 by mixing 91 and E85, there is little to gain from an upgraded turbo except the weight reduction of your wallet.

That is so far from true.

The shift in the powerband alone was worth the price of admission.

I am stuck on 91 here, and with the Vargas S2 the car is a totally different animal.

It pulls thru the entire RPM range now, something the stocker could not even remotely do.

91 has less potential than 93 obviously. But the same mods and delta percentage gains apply. Us stuck with 91 will just never see 93 power levels.

Rcampos04 · Jun 20, 2017

smdandb2 said:
That is so far from true.

The shift in the powerband alone was worth the price of admission.

I am stuck on 91 here, and with the Vargas S2 the car is a totally different animal.

It pulls thru the entire RPM range now, something the stocker could not even remotely do.

91 has less potential than 93 obviously. But the same mods and delta percentage gains apply. Us stuck with 91 will just never see 93 power levels.

Thanks for your reply, how much whp are you putting down with 91 oct and Vargas?

smdandb2 · Jun 20, 2017

Rcampos04 said:
Thanks for your reply, how much whp are you putting down with 91 oct and Vargas?

Beats the hell out of me. I'll probably never get it on the dyno. We have a bunch of AWD Mustang dynos around here, and no one can use the things properly. I have been on two different Mustang dynos with wildly varying results. And since I have no good comparative baseline, it would be pointless to get back on one. If I did get on a dyno, it would be a Mustang and the numbers would be low compared to everyone that uses a Dynojet... and it would just turn into a pissing match.

But all I changed with all my existing mods was the turbo, and it was soooo worth it.

metalhead79 · Jun 20, 2017

smdandb2 said:
Beats the hell out of me. I'll probably never get it on the dyno. We have a bunch of AWD Mustang dynos around here, and no one can use the things properly. I have been on two different Mustang dynos with wildly varying results. And since I have no good comparative baseline, it would be pointless to get back on one. If I did get on a dyno, it would be a Mustang and the numbers would be low compared to everyone that uses a Dynojet... and it would just turn into a pissing match.

But all I changed with all my existing mods was the turbo, and it was soooo worth it.

Interesting...

PICANTE · Jun 20, 2017

You don't need stage 2+ Turbo unless you are going built motor, stage 2 turbo from Vargas is plenty

Rcampos04 · Jun 20, 2017

Then the question is, how much can I make with 91 oct and stock block?.

How much whp with or without Vargas 2

Rcampos04 · Jun 20, 2017

Then the question is, how much can I make with 91 oct and stock block?.

How much whp with or without Vargas 2

Bull Run · Jun 20, 2017

I ended up going with the "plus" version in order to move more air with less boost pressure. It's over 110 degrees nowadays here and temperature control is a must.

Bull Run · Jun 20, 2017

From Adam's site:

Stage 2: Up to 500-525whp

Stage 2+: Up to 600whp

Horsepower levels listed are maximums and require a built engine and fuel system to go beyond 425whp. Stock engine can be used up to 425whp, it is suggested to do this with the TUNE+ Port Injection system and a higher grade fuel (E85, Race Gas)

91oct - 345-360whp depending on fuel quality and modifications

93oct - 365-385whp depending on fuel quality and modificatons

E30 - 390-410whp depending on modifications, fuel system will be maxed out.

Regs · Jun 21, 2017

I looked up Adam's site, and it seems to be priced a lot cheaper from Vargas's site. Is the actuator included, and installation accessory parts? Is that why it is cheaper?

Elgyn · Jun 21, 2017

has anyone tried the slightly larger focus RS turbo? Just asking cause I may or may not have one lying around....:bolt:

The biggest power gain on 91 oct?

Rcampos04

Active Member

Glenn G

Well-Known Member

Rcampos04

Active Member

metalhead79

That thang got a Hemi?

smdandb2

ManBearPig

Rcampos04

Active Member

smdandb2

ManBearPig

metalhead79

That thang got a Hemi?

PICANTE

Well-Known Member

Rcampos04

Active Member

Rcampos04

Active Member

Bull Run

Well-Known Member

Bull Run

Well-Known Member

Regs

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Elgyn

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