[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Personally all I would change is the collector

 

get one from diffilipno or a Aeroflow collector, one that goes from 2 1/2 up to 3 inch over a 5-10 inch length

something like this or similar would work nicely

 

http://dpe.net.au/index.php?route=product/category&path=20_39

 

10 HP and a heap of torque in that change, no it’s not about every HP but is about making a set up that is as efficient as possible

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

I dont see the piping as boogie

 

I see a 90 degree bend out of every flange near head

Every pipe has  a mild 30-45 degree bend and a more aggressive close to 90 degree bend

and 2 pipes have a extra very mild 30 degree bend

and they all look to be very similar length

 

so what I see is a very ballenced set of pipes that someone has spent a lot of time designing, doesnt matter if the bottom set doesnt look  symmetrical like the top set, what does matter is they flow nicely

 

Definetly get them coated

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Hay mate only just seen this

 

Magna flows are gone

mid mufflers and hot dogs are all yours for a low low price of $39.99 plus postage

the diffilpino twin 3 inch in and out I will be asking more like $200 plus postage

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

http://s1045.photobucket.com/user/pahchay26/media/Mobile%20Uploads/20150912_135443_zpsbk22pmii.mp4.html

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

http://s1045.photobucket.com/user/pahchay26/media/Mobile%20Uploads/20150912_145350_zpsmmtl4hbe.mp4.html

• This reply was modified 9 years, 1 month ago by  vs manta 218.

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

He is coming here racing the VL for first time this weekend

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

It is a shame I never got a comparison against them

Yeah robs engine and whole set up is mental, he is extremely good at making a car fast, even on basic set ups he has pulled awesome HP numbers and has a some good little tricks he does

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

One thing I didn’t mention to anyone about my pipes was I left two gouges in my drive way when I left and now have had to lift it 25mm to get enough clearance

 

 

Gary 2 inch for 454 would be my personal decision, would probley get some one to use that programs pirate used on my thread on about page 3 that showed the 2 step designers lengths and all the harmonic lengths

 

 

Something like 6 inches then step from 1 7/8 to 2 inch

 

 

That’s if you have a spare 5 days to make them

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

That was actually a big surprise to me as well

 

 

I have also been told 4:11 gears doesn’t help with traction at all either lol

 

 

Yeah to easy with the ride

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

They look like a good set of pipes

 

 

Just the collector need to be tapered

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Yeah you would be right actually, big HP N/A engines that flow enough would have big gains in these as well

 

 

Robert valastro comes and stays at my place when ever he goes racing, I spent a good half hour looking at his pipes from every angle while it was on the trailer to get a good idea on how to make myn,

 

he he even come here when I was half way through them so I was able to compare a bit more

 

his pipes are a real work of art and they do work great on his engine, he is making 520 rwhp N/A and 150hp nos on top of that though and at 8500rpm so it needs them and he gained .3 second or so with them

• This reply was modified 9 years, 1 month ago by  vs manta 218.

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

380rwkw and the v2 blower I didn’t have a problem

 

 

The v7 is proving a different story lol

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Iv actually been told drag tyres, semi slicks are no good on a dyno and slip just as bad, been told any soft or new tyre is no good

 

 

When tyres are new they have oils in them and these come out when the tyre becomes hot and makes it sticky for the road, but this is bad on a dyno roller

 

 

Soft is great on a road but not so great on a 2mm nurling

 

 

Need really old really hard tyres where all these oils have already come out of them

 

we don’t really need a dyno as I have the provision for wide bands in my collectors and we just screw them in and this wires into leppys inavate wide band and there it goes into efi live and displayed with all other data

 

 

So we are goin back to some road tuning again soon and see how that turns out for us lol

Might still have traction issues though

 

 

To be honest I’m just over the moon I can actually drive it without surging wildly and nearly hitting my face on the dash and snapping axels

 

 

Taking it to C4C in VIP section in a few weeks

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

It really is a serious amount of effort in making a set

 

 

Don’t think I would recommend this amount of work for a N/A 500-600hp Holden engine unless your really really keen but for boost there is a large noticeable increase in efficiency

 

 

I’m not a expert in it but I think a lot of the torque come from 1 7/8 for 10 inches then the step to 2 inch, and obviously the increase e85 would of added but it appears there is a good scavenge affect there

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Dont think i will ever put small enough brakes on the rear to fit 15 rims on this car ay

 

Im really not out for 1/4 mile times, its purely a street/fun car

 

<span style=”line-height: 1.5;”> </span>

<span style=”line-height: 1.5;”>Sure i will take  it down there for some fun but i dont ecpect any great times with coil overs, manual, and 18 inch rims </span>

 

<span style=”line-height: 1.5;”> </span>

<span style=”line-height: 1.5;”>If i was to build a drag car i would keep it simple, big cubes,big stall auto, small light car running on methanol with 4.7 diff gears and nothing in it besides me and a engine </span>

think a vs shell would be my last choice for a drag car

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Sciatic nerve pain 

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Ok well thought I should post my results

all I have changed is pipes and converted to e85

 

 

Sound wise compared to pacemakers 5002 goin straight to twin 3 inch system and now using these pipes to the tapered collector and the 3.5 inch cats and 3.5 pipes to rear of gear box where it connects to my twin 3 inch system

 

 

It is quiter, noticbly quiter on light throttle and idle, 2000-3000 rpm with bit of throttle sounds much better, use to have a drowning sound and now is much nicer v8 rumble sound

 

 

Low torque – all that said I would loose low torque are severely wrong, I have picked up a whopping 200rwnm below 3000rpm

Mid to top end I can not confirm yet as I only have 11.5 degrees timing at top end for now till I clock a few more km on my new engine and we crank the timing up a bit but at that I still have trouble keeping it tied to dyno making 400rwkw at 5900rpm @11psi and then spinning hard and smoking the tyres on dyno and the power line just goes flat and boost continues climbing till where power should fall over at 6800rpm

 

 

The biggest difference of all

My boost

before at 6800rpm I had 18 psi

now at 6800rpm I have between 13-14 psi

 

 

That goes to show how much the pacemakers really where choking it up, I thought they would of been choking it and this is hard proof they where and this is also hard proof the pipes are working well

 

 

Thanks all that helped me out through there build

• This reply was modified 9 years, 1 month ago by  vs manta 218.

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

I can fit 18s on it lol

 

 

I was actually looking at smaller rear brakes just the other day for this reason lol

 

 

I have 2 lots of 18 inch rear rims to use but haven’t got any tyres on them and they are only cheap ones I found

 

 

I’m actually looking for a nice set of 18s and goin to run nitto NT05 tyres on it

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Well today was just as good as last Friday, got a call asking if I wanted to hit the dyno so of I went, driving there my nerves where just completely  shot

 

 

Getting there and they got even worse

 

 

Our plan was never to be pulling huge power, we simply want it running nicely and very safely so I can clock up some km as this motor still only has 450km on the clock at this point

 

 

So hocked up the inavate wide band Into my collector as that’s what we use to tune it and back it on to the rollers and then had the dynos wide band up the tail pipe to see any comparison as not many people have wide band provisions in there collector to be using and see the difference to tail pipe

 

 

The results of this are the tail pipe always reads slightl leaner then the wide band in the collector so the lambda on the screen in pic is actually a little out as our wide band in collector is more accurate and around 0.8 lambda is our target under WOT and 1 lambda at cruising

 

so first things first anyone that said I was goin to loose low down torque with my new extractors I made, sorry to say it but you are way way wrong

 

 

Below 3500rpm I picked up nearly 200rwnm of torque

 

Secondly my boost has significantly dropped with these new pipes,  before at 6800 rpm I had 18 psi, now at 6800rpm I have somewhere between 13-14 psi so the pipes are a massive improvement with flow

 

 

So previous results where 430rwkw at 6800rpm on 98ron

 

we looked at the 4 power runs last tune on the dyno computer and the last 2 ran lean as fuck, Into the mid 13s AFR, 3rd last run was good AFR at 410rwkw so really that’s where the last tune should have stopped

 

I was not happy and I think it’s a real blessing in  disguise that my fuel pumps fucked out and I never got to drive it after that tune till now with this new tune as it would of surly fucked my motor quite quickly

 

So onto today’s efforts 3rd power run with a absolutle massive 9.5 degrees of timing and 29 degree Intake air temps and it slapped down 400rwkw at 6300rpm

 

 

Next power run we encountered the dreaded wheel spin and trying several different ways of strapping it down didn’t change it

 

 

Final results on e85 we didnt get a read out more then 400rwkw but it did the same back to back 3 times in a row with 399rwkw on the last 2 looking exactly same as this

At 5900rpm it just brakes traction and can see that clearly on the power cord just above and to the left of the arrow on screen and can see it’s still running a little rich as what looks to 0.85 lambda is actually 0.8 on the wide band fitted in the collector and it contunues making power till 6800rpm

 

 

So final run seen

399rwkw at 5900rpm at 11psi and continues till 6800rpm and 13-14psi

A massive 11.5 degrees timing

29 degree Intake air temps

 

 

That power line looks like it would go to 430-440rwkw if it keeps traction right now

 

We believe we should be able to get 15-17 degrees Into it with this air temp not a problem and we haven’t turned on the meth injection and with this air temp I don’t think I will either

 

 

 

 

• This reply was modified 9 years, 1 month ago by  vs manta 218.

[vs manta 218Participant Vs hsv manta View build HERE Member since: March 2, 2015 Posts: 796]

Years and years ago I Had a leak on a exhaust on a old shit heap ute I had to drive around for a few days

 

 

Pissed me off real quick

 

 

Got a coke can cut up and used as many hose clamps as possble to hold it on

 

 

Fixed it good

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