AndrewG27
forum member
I do have the boss manifold.
Boss 302 Intake has arrived. Fitment and dyno coming!!!!
- Thread starter JJ@WMS
- Start date
The results on our car speak for themselves.
11.12@122mph is our best time so far. The car has gone a best of 123mph.Here is the short list of mods.
Dynatech LT's, no cat mids
Pypese 3 inch supersystem
Boss intake
JLT CAI
Mcleod RST clutch
Metco LCA's with relocation brackets
Alum one piece DS
Stock 3:73 gears with true trac diff
Stock shock, springs, struts.
Racestar 15x10's on the rear with 28x10.5x15
Racestar 17x4's
Race weight of 3550 with driver.
Tq reduction was on in those runs and we are shooting for better times soon.
JJ
Was this with pump gas or tuned for race gas?
i beg to differ, you typically want to shift 200-300 past when your power starts dropping off
that is why i am trying to keep a 7700 or so shift point
plus it brings you in at a higher rpm and better power range on the shift
JJ@WMS
forum member
Rob72
No Japanese Mustang Here
Do any of you see a point of running the Boss intake if you are not launching around 6K?
Kingcrabb
forum member
i beg to differ, you typically want to shift 200-300 past when your power starts dropping off
that is why i am trying to keep a 7700 or so shift point
plus it brings you in at a higher rpm and better power range on the shift
Exactly. stock manifold drops off around 6500. so turning past 7k is pointless.
What i meant was if you are stock stay under 7k Unless u have a boss mainifold.
Yes, if you plan to race at the track.
Like Beefcake said, you want to shift above peak power that way on the shift fallback your engine will still be in the best "column average" of power.
Just because you don't launch at 6k, doesn't mean the engine won't see that RPM a lot at the track. If you are afraid of beating on the car and trying to get your best ET, well the Boss manifold is probably not for you.
Like Beefcake said, you want to shift above peak power that way on the shift fallback your engine will still be in the best "column average" of power.
Just because you don't launch at 6k, doesn't mean the engine won't see that RPM a lot at the track. If you are afraid of beating on the car and trying to get your best ET, well the Boss manifold is probably not for you.
That graph doesn't really show the power as falling off. It looks like its carrying it to me.
I know I was bogging if I was not launching around 6k with the boss intake on.
I'd look into an axle brace as well.
Kingcrabb
forum member
The graph has nothing to do with what i said.
My original comment was "Unless you have a boss manifold there is no point in revving past 7."
He responded with "i beg to differ, you typically want to shift 200-300 past when your power starts dropping off
that is why i am trying to keep a 7700 or so shift point
plus it brings you in at a higher rpm and better power range on the shift"
And i was agreeing. he is running a boss, so his power carries past 7. a stock manifold car will drop off at or around 6500. So my original statement of not going past 7k UNLESS u have a boss holds true.
Sorry if i wasnt more clear.
My original comment was "Unless you have a boss manifold there is no point in revving past 7."
He responded with "i beg to differ, you typically want to shift 200-300 past when your power starts dropping off
that is why i am trying to keep a 7700 or so shift point
plus it brings you in at a higher rpm and better power range on the shift"
And i was agreeing. he is running a boss, so his power carries past 7. a stock manifold car will drop off at or around 6500. So my original statement of not going past 7k UNLESS u have a boss holds true.
Sorry if i wasnt more clear.
Most stock manifold cars I've ever seen and dynod make peak power around 6850 hence you would still want to shift past 7000
He isn't. But he's supercharged, cnc'd heads and is running aftermarket cams. His powerband is quite different.
Now on a stock longblock car thats basically just tuned and bolt ons, with a stock coyote manifold, I still see them make peak around 6850, not 6500.
KungFuHamster
forum member
i dont think i agree with this for this reason: 3 mph.
i was shifting at ~6800 in my stock intake car and my mph was 108-109.
i raised the shift rpm to ~7300 and mph went up to 110-111.
Kingcrabb
forum member
I just looked up a ton of graphs before i made another comment.
I stand corrected on the 6500. It is more around 6650 (just after 6500). But either way, power is still dropping off before 7k. Unless you have LTs and full bolt ons I dont see any benefit going past 7k with stock mani.
I thought we had a vortec with boss and built motor???
I stand corrected on the 6500. It is more around 6650 (just after 6500). But either way, power is still dropping off before 7k. Unless you have LTs and full bolt ons I dont see any benefit going past 7k with stock mani.
I thought we had a vortec with boss and built motor???
Kingcrabb
forum member
I ran 113 bone stock shifting at 6600. and a 116mph shifting at 7 with just a tune...
KungFuHamster
forum member
i understand. im grannyshifting and running in shitty air, so my times are not what they should be. i am aware of this.
all im saying is, i raised my shift point and the car picked up by 3 mph. i think thats pretty significant considering "hp drops off after 7k". if that was truly the case my mph would've went down.
Your HP does go down after 6800'ish. But you're basically shifting higher to set yourself up better in the next gear. So the power you lose at the top end shifting higher is more than made up for it in the next gear.
yes, peak power is right about 6600, but it still carries over 700rwhp to about 7450.
no boss on the car
peak torque is almost from 5600 to 6500.
Shift high!!!!!
no boss on the car
peak torque is almost from 5600 to 6500.
Shift high!!!!!
KungFuHamster
forum member
Isn't that the mantra of JPC? lolol
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