TVS 1320 Ported vs Non-Ported (DYNO)

[Cavi SS]

Mods:
TVS 1320 | 2.6 PULLEY | 60 LB INJECTORS
Ported head
3" intake | stock ported throttle body
badmab header | 2.5" high flow dp and catback
water/meth
HpTunes were the same

Some smoothing was done to the inlet, and the outlet was opened up a tiny amount. There isn't enough material on the HARROP TVS to port like the Eaton m62.





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For fun we loaded a tune I made to mimic an e-85 timing table, unfortunately we ran into knock past 6500 rpm @ 26* of advance. Just needs more water/meth jetting. I imagine had the knock not occured, it would of hit 340whp.

[qwikredline]

I saw this post in css, not sure what you are gaining; the change is so small, it is within data collection variance and road wheel dynos are rarely repeatable to 1% anyway. I am surprised at the drop off, not sure who is tuning and why that is, but I am sure Area47 can tell me.

I make over 320 without Meth, so not sure that I would go to the time and expense to do what you did. Thanks for all the time money and effort though, it assists those of us with a Harrop to make an informed decision on future mods.

[Omnigear]

I saw this post in css, not sure what you are gaining; the change is so small, it is within data collection variance and road wheel dynos are rarely repeatable to 1% anyway. I am surprised at the drop off, not sure who is tuning and why that is, but I am sure Area47 can tell me.

I make over 320 without Meth, so not sure that I would go to the time and expense to do what you did. Thanks for all the time money and effort though, it assists those of us with a Harrop to make an informed decision on future mods.

the OP tuned it =p

[Cavi SS]

dbl post

[Cavi SS]

I saw this post in css, not sure what you are gaining; the change is so small, it is within data collection variance and road wheel dynos are rarely repeatable to 1% anyway. I am surprised at the drop off, not sure who is tuning and why that is, but I am sure Area47 can tell me.

I make over 320 without Meth, so not sure that I would go to the time and expense to do what you did. Thanks for all the time money and effort though, it assists those of us with a Harrop to make an informed decision on future mods.

it's a small gain.. was worth a shot
i tuned it

I'm sure your dyno reads 320whp. Our local dyno reads 334whp on a methed 2.6 tvs setup, and 248whp on a 2.7 methed m62 setup.

[qwikredline]

I make that power with an LNF cat back by the way. Exhaust flow numbers for 2.5 versus 3.0 dont justify the 3 inch drama

[Cavi SS]

I make that power with an LNF cat back by the way. Exhaust flow numbers for 2.5 versus 3.0 dont justify the 3 inch drama

that's why we didn't bother to change out the exhaust on this car.

Doesn't really matter what your number is unless there's a baseline for comparison. All you got is a large hweny for a hp # to throw around. <-- meant this in a nice way, not to be disrespectful.

[TTMR]

Ao you gain above 5k but losse below it. Given how much time is spent above and below that rpm it hardly seems good.



Thanks for the data!

[Cavi SS]

Np I enjoy these projects

[Steddy]

that's why we didn't bother to change out the exhaust on this car.

Doesn't really matter what your number is unless there's a baseline for comparison. All you got is a large hweny for a hp # to throw around. <-- meant this in a nice way, not to be disrespectful.

lol

There is no "nice" way you're going around talking about his "only big numbers"

I've seen the car on more than a few occasions when it was both slower than what I was running and faster than what I was running.

It's 320whp period, and a better way IMO to judge how much a car is flowing is simply scan it. Lbs/min never lie, unless something is mechanically wrong.

How about I try the nice:

Thanks for showing us all that porting a Harrop is a waste of time.

meant in the nice way

[USMCFieldMP]

Harrop did say when they released it that it would be basically pointless to port it.

[Steddy]

Harrop did say when they released it that it would be basically pointless to port it.

Don't learn yourself anything!

That's the man!

Trying to keep us down!

[Cavi SS]

lol

There is no "nice" way you're going around talking about his "only big numbers"

I've seen the car on more than a few occasions when it was both slower than what I was running and faster than what I was running.

It's 320whp period, and a better way IMO to judge how much a car is flowing is simply scan it. Lbs/min never lie, unless something is mechanically wrong.

How about I try the nice:

Thanks for showing us all that porting a Harrop is a waste of time.

meant in the nice way

Well I'm basing my figures off a previous dyno I had done with a fully bolted and methed m62 2.7 15.5 PSI setup. Timing wasn't to aggressive, started @ 15-16 degrees around 3k and hand smoothed its way up to 24.5 by 6500 rpm. Over all, after playing with 3 different style fueling curves (lean to rich, flat line afr, rich to lean) the end result was within 1hp/1ftlb @ 248whp/227ftlbs.

For the MAF LB/MIN FLOW: if it means anything... @ 7100 the TVS car above was flowing 39.48 lb/min
My guess is the 2.5" dp with high flow cat and 2.5" magnaflow catback is holding pack the top end a bit, and would most likely shift the peak torque out to 5k. On the dyno the car peaked 25.x psi; the owner lives 50' above sea level and sees 27-28 psi.

Np, was a test I gladly accepted...

Though, you took a joke and turned it into cruel intentions. It's always like this... think outside the box, only to be stuffed back in one.

Harrop did say when they released it that it would be basically pointless to port it.

Was worth a shot IMO

now we know for sure

[USMCFieldMP]

Only 10 lb/min less than I was flowing when I put my car into "winter storage".

[Steddy]

Well I'm basing my figures off a previous dyno I had done with a fully bolted and methed m62 2.7 15.5 PSI setup. Timing wasn't to aggressive, started @ 15-16 degrees around 3k and hand smoothed its way up to 24.5 by 6500 rpm. Over all, after playing with 3 different style fueling curves (lean to rich, flat line afr, rich to lean) the end result was within 1hp/1ftlb @ 248whp/227ftlbs.

For the MAF LB/MIN FLOW: if it means anything... @ 7100 the TVS car above was flowing 39.48 lb/min
My guess is the 2.5" dp with high flow cat and 2.5" magnaflow catback is holding pack the top end a bit, and would most likely shift the peak torque out to 5k. On the dyno the car peaked 25.x psi; the owner lives 50' above sea level and sees 27-28 psi.

Np, was a test I gladly accepted...

Though, you took a joke and turned it into cruel intentions. It's always like this... think outside the box, only to be stuffed back in one.



Was worth a shot IMO

now we know for sure

Curious minds always acquire new knowledge, but the fact of the matter is the performance oriented Harrop already tried. I am a firm believer in questioning everything and getting to the root of all questions.

Things you have to take into consideration is the source. Harrop tells me it's not any better I will probably believe them. Random home brew company tells me I may look deeper.

And lbs/min shows overall flow, and if you have enough fuel for flow, it will always show at least if there is room for improvement.

Which is what we're looking for here...you're porting the blower for more airflow...if you cannot efficiently compensate for the added flow than nominal power will be gained.

39-40 lbs a minute isn't horrible, but the catted downpipe and exhaust isn't what's holding you back. It takes more hp each time you pulley down to spin the blower more. That's something a lot of people do not take into consideration. If you pick yourself up a book on forced induction systems you'll see that making power doesn't always mean giant 3 inch exhaust.

The guy with the 'big numbers' kind of puts the whole "corked exhaust" theory DSM's made popular to rest.

They were turbo cars, that had crush bent 2-2.5" exhuasts on em.

Same with throttle body size. Ford's 5.0 in the mid to late 80s came with TB's that were a touch too small on purpose for emissions reasons.

Way to think out side the box though, want more power out of a roots style, rev it more. Port the head and add some springs, make sure there's enough fuel to spin it up.

[Cavi SS]

good info

I'll keep that in mind for this spring when the new motor goes in. Cant wait to see what it does with a 8k redline and spinning the blower within it's efficiency range.

Been getting tired of fighting for every ounce of power with insane amounts of methanol on california 91 octane.

If you wouldn't mind, i wiped the OP. Just delete the thread

[Steddy]

No need to delete man

It'll save the nubs when they come sniffing around for information

No one is yelling at you, and no one is telling you to GTFO



Don't lose sight on the big picture

[Cavi SS]

majority of them are on css

let them read it there

we still have that lysholm twinscrew to play with. big picture is still in view lol

Trying to figure out what is causing the curve to hit a wall @ 6600-6800 rpm. The head is ported... but its on stock valvetrain

[Steddy]

Agreed, but it's not like we don't appreciate the proof here.

[Cavi SS]

alright alright, cleaned up the edit.