Sandown Historics - Few Zeds Runing in Sc class

[Zedman240®]

Went today to Sandown for the annual Historics held about every November and another excuse to take the zed out onto the public road! Finally got the speedo working so I could tell how fast I got there! There were plenty of the older eighties type touring cars; Holden and Fords with people drooling over some XY GT's and hundreds of MG's as far as the eye could see. One car I've wanted to see was the sports sedan of Darren Hossacks Audi A4; current lap record holder with a 1:08.67 around Sandown....and a 1:28 around the Island. With a 6 liter Chev engine, it should be enough to motivate anything around quickly! Took a few snaps of any zed I saw and had a chat to a few owners...Got some nice ideas for my zed!

 

Enjoy!

[Zedman240®]

And a couple more pics... They had Chris Muldoon (white zed above with G-nose) running with the field of sports sedans because there was no other class for him....he did an excellent job of keeping up with one car!

And a pic of the Audi Ive been hanging to see....

[Glen]

James Flett's machine was quite nice, very well presented race car, to think it was out doing 400hp pantera detomaso's and porches. Stock brakes with his own brake bias running full rear as much as it allowed him. His motor is running 13-1 comp. He had 225rwhp, pretty good for a 2.6 running 2 inch Hitachi's

 

BTW that audi sounded awesome but the biggest highlight was watching the 6 liter Calibra(?) catch on fire right in front of us. Everyone was relieved to see the driver exit and not on fire. Looks as though it may have been a hydaulic line onto the rear brakes as he over shot leading into the corner right before the fire. Overall a good day was also good to see Dimitri and have a quick chat about his RB.

[Zedman240®]

I thought I left a tad early! Did the F5000 run again Glen? I left just as the regularity runs were about to begin. There were two groups, and I could feel the sun burning me so I decided to leave...Next time I'll pack a lunch and stay for a while longer....Its always good to catch up with everyone at events like that....

[Glen]

Next year, marquee with BBQ. So bring a chair and meat next year. We will be doing the same for P.I. but you will probably be a bit more busy if you are showing your machine again. If not we will be there with a proper setup.

 

What time did you shoot off roughly? The F5000's ran again. Main attraction for me as i think they are just animals.

[DevilZ]

His motor is running 13-1 comp. He had 225rwhp, pretty good for a 2.6 running 2 inch Hitachi's

 

 

I spoke to the owner too and he told me he had 225rwhp with the 2.6 and twin SU's but is that actually possible??

225rwhp is like what around what, about the 175rwkw? I dont think twin SU's can flow that much right? Plus its only 2.6 litre capacity.

[Glen]

You can make any car go fast its just a matter of how much. running 13-1 comp with 2 inch hitachi's must be possible because he was doing it. He was no slouch on the straight. There was a lot of work done to the motor, he told me the cam specs and valve sizes etc but it has slipped my mind. BTW there isnt that much of a difference from 2.6 to 2.8 you know i would have worked my 2.6 instead if i could have got some flattops for it.

[DevilZ]

I really think he was being a bit over optimistic. I reckon 225 engine HP would be more realistic. Like what woud he have done to the origional motor. Okay so modified heads with port work. The valves should already be large enough but even still say larger valves. Then high comp pistons, modified ignition and an exhaust system. Nothing much else he could really do and that would take him to 300 engine HP? I really do think he wasn't quoting accurate figures. According to what he was saying, he would be making about 115 HP per litre from a single over head cam engine with twin 2 inch carbs. I think a lot of guys who have done a lot of engine development on L-series engines would agree its not possible to achieve with these modifications unless the dyno has its compesation values played with.

 

[pauly_adams]

i dissagree. i belive that it would be more than possible. there is a na L28 zed in japan its not stoked but produces over 400rwhp and runs a quater in 7.8 sec mind you he runs nos down the quater.

 

 

cheers pauly

[DevilZ]

i dissagree. i belive that it would be more than possible. there is a na L28 zed in japan its not stoked but produces over 400rwhp and runs a quater in 7.8 sec mind you he runs nos down the quater.

cheers pauly

 

I dont think the L28 in Japan was running twin SU carbs or any carbs for that matter. Hahhaha he must have like a 250 shot of NOS !!!

Seriously this guys Z doesn't put out 225rwhp. I can garuntee you that. Cars with twin SU's and 2.6L cant produce that power. You can make a dyno read whatever you want. I can dump correction factors in to make a dyno read out my Z as putting out 20000000 rwhp. Its not realistic though.

Anything running a 7.8 is incredibly fast. Do you have a link to its run? I'd love to take a look.

 

 

 

 

[Glen]

oh ok, so did you watch the race? did you watch how the pantera didnt pull away from him on the straights?? Are you going to tell me the rest of the field mainly being big V8's took it easy to make the "Z" look faster in a straight line than what it was. BTW iirc he had 275hp at the fly and watching him with my own eyes he came 3rd in a race against many pantera's and porches.

Theres heaps more you can do to a motor than what you mentioned.

 

 

Edit:

Sorry if my post sounds agressive but when i see things with my own eyes and more so so did you i wonder how you come to conclusion that he must be a lier.

[DevilZ]

oh ok, so did you watch the race? did you watch how the pantera didnt pull away from him on the straights?? Are you going to tell me the rest of the field mainly being big V8's took it easy to make the "Z" look faster in a straight line than what it was. BTW iirc he had 275hp at the fly and watching him with my own eyes he came 3rd in a race against many pantera's and porches.

Theres heaps more you can do to a motor than what you mentioned.

 

 

Edit:

Sorry if my post sounds agressive but when i see things with my own eyes and more so so did you i wonder how you come to conclusion that he must be a lier.

 

 

No its okay. I can see where your comming from but he what he is claiming just doesn't seem possible. I can understand why he could stick with the eights down the straight. He had high corner speeds and so got good runs down the straight. The reason why people with Z's go to triple webbers induction over twin SU's is because they need more air for there engines. A cars power comes from the amount of air it can flow into the cylinders right. The twin SU's will easilly stop him achieving the power he is claiming because no matter how good his head is etc..... the SU's cant flow enough air.

His limited by the mods he can run because his in the Historics. Hence the stock brakes, twin SU's, 2.6L etc...he can only run what the car came with. So with regards to his engine there isn't a lot more he can do to it. I'll give you an example. Dimitri off this forum was putting out something like 145rwkw from his L28 with triple throttle body injection and a lot of other mods. Thats less power then this guy is claiming from his 2.6L with twin SU's. I see 3.1L race engines even struggle to put out those power figures.

 

 

 

 

[620Z]

Plenty of people quote all sorts of numbers when it comes to HP. most are honest, some exagerate and then others are miss led by dodgy Dyno settings.

Just because a car has a V8 doesn't mean it is fast or has loads of HP. My question would be what times was the guy doing around Sandown and was he on slicks? 

[Zedman240®]

Hmmmm...this reminds me of another thread recently...deja-vu! That Philip Island Peter Hall discussion of lap times...geez... he's got enough power to do 1:26's around Sandown with 195x60-14 Br RE555's...which is pretty quick. Others I know with healthy L28's with triples are doing around 1:24-25's. It all comes down to the driver! I have lap records of Sandown with a Mitsubishi Mirage doing 1:26's also...figure that out!

[Brabham]

Have seen that Zed running in Sydney. It usually finishes just behind all the Porsches so he is doing very well considering the Porsche guys have probably spent 5 times the money on their cars. It is immaculately turned out. I think the power figures are realistic those guys do a fair bit of work on their cars within the strict confines of the historic rules. Even call it 200rwhp and he is doing very well. If you challenge it, enter your Zed in the historics and see how you go Another Zed on the track is always good!

[zr240]

To be honest if he has as much kw as he says he should be faster.

 

Also did the zed ever come with 2 inch carbs? I would love to see what brakes he was running cause with that much KW the standard brakes he is meant to be running woulnd last more than a few laps.

 

I might be wrong with my assumption but I spose if you throw a shed load of cash and have some driving talent then you can do anything.

 

I think perry in his detomatso did a 1:21 in Qual and was just crusing in the races (now thats quick)

 

There are alot of guys running in historics who arnt that good drivers so there is no reason that a decent driver in a zed cannot get good results however when I looked into historics the zed was an hard car to make quick (within the rules anyway)

 

just as another funny note that means he has 25more rwkw than my rb25det racecar!

 

Now that I have made myself sound like a prat I will sign off

 

Ash

[Zeddophile]

Also did the zed ever come with 2 inch carbs?

 

Group S regs only state that the type, number and make of the carbies must remain as standard - the bore size is free, and the intake manifold only needs to be of a period type....

[Glen]

I know i said 2" but thinking about it later judging by the size of the hats i would say they were around 2'1/4" carbs maybe a bit bigger, he just put hitachi fuel bowls on them After every race he was checking the head gasket for leaks running 13-1. Also the brakes were standard but the pads were a different story. Also ran as much rear bias as it would let him and yer he did through a bucket load of cash in the motor. He seemed to be a talented driver aswell.

[Brabham]

Anyone here thinking of running their zed in historics? When (or if) I finish mine I will try it in regularity first but I don't have the cash for Sc. If I were spending that much I would probably buy an open wheeler. As an aside some guy offered to sell me his 260 2 seater in Sc for 20K which is probably pretty good considering how much was done to it. It was as light as possible all underbody sealant removed paint about 1 micron thick and uneven because all Niki removed half the rubber seals not there! PS that De Tomaso is nice no problems finding HP there