How did you get 4.6 liters? Just bored the 4.2?

 

I have 4.8 liters, and achieved this via boring out a 4.2 engine block to 92mm, and left the stroke stock.

Not all blocks can go this far, only the very late ones (I used a 2007 one). But I guess most blocks could go till 90mm, so still 4.6 liters with a 4.2 stock crank.

You can also stroke the engine to about 95mm, that with the stock bore would bring you close to 4.5 liters. Arden still sells a set (forged crank + rods) for about 4000 euros.

But, don't get your hopes up that with the stock Eaton you could get similar gains I have achieved here!

 

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max is that 100-200 in Km, or MPH? after some thought yes must be Km!

in the states we have some open highway races(most famous is the STCC, Silver state classic challenge). Nevada USA

100 miles (now shortened to 90 miles) of open 2lane flat road.no barriers no fences , if you go off, its into rocky ditches!
so far no forced induction cars have broken the record of an N/A car, for shortest time ,end to end!
seems that supercharged engines dont last at full boost for 1/2 hour steady full throttle,full load! heat buildup, and 5000ft altitude.
other things that limit, most cars dont carry enough fuel, for the time run, they add bigger auxiliary tanks but weight increases, then tires dont last with centrifugal forces for sustained time periods. over 200MPH. with spoilers to keep the front down.

some people use Nascar wheels and tires and lose top speeds by as much as 5/10MPH at the top end!

they have classes for different types of cars, and the most exciting is the UNLIMITED modification cars.

anyway something to think about, lot of fun and lot of go-fast car guys.

they hold the races twice per year out side of ELY Nevada, roads are blocked both ends and moniterd by helocoptor!

 

if you may be interested, google Texas Mile, some interesting cars.

0-to 1mile distance, to see who is the fastest.

 

[quote=ronbros;if you may be interested, google Texas Mile, some interesting cars.

0-to 1mile distance, to see who is the fastest.[/quote]

Standing mile ( of course 1/4mile too ) is very famous thing here. Many events during the summer.



as well as some other speed activities:


Greetings from 65 degrees north latitude

 

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nice videos , vettes seem to be the best for available speed parts, cost wise.

hard to beat cubic displacement and push rods valves, without spending a lot of money!

that 1965 vette is it supercharged, or big N/A displacment, gotta be a big block chevy engine!

small fact of many years back, 1965,i was 30yrs old, and known as good performance tech man.

guy brought to my shop 1st 396 BBC vette sold in Boston Mass , and gave me keys and said make it faster.

he said i'll be back in couple weeks. (YES, i had a great time with that car, especially at night).

all went well, a 1965 396 BBC Chevy Corvette 1st one around town!

 

65: about 650hp from 400cid + 400hp two stage nitrous = 1000hp+ .
The main question is how to get that body go 200mph without take off.
99: 427 SC = 1200hp+ easy daily driver

 

yes 99 ,hard to believe that body style can go 200mph without lifting and floating! something to think about.(Km/mph).


altho at Tex. mile a stock body 1993 Toyota Supra went 240mph?

he tried some add on spoilers and car became uncontrolable, slipping and sliding!

question; 99 you say 427 SC, what does that mean?

 

a friend of mine way back in time,1958,was from Finland,same age as me.

i had a 1957 Corvette with twin four barrel carbs.

he raced a 1932 Ford roadster with a SBC,Chevy V8, some mods of that era , was not afraid to go fast and drive hard.

just young guys having fun!

 

65: They have made a lot of aerospace engineering. That's why outsiders are not allowed to check under the car to see the mods.....big secret.


99: SC = supercharged. Not sure about the type but could be ProCharger.


The fastest here are Vettes and Supras. Then AWD Audis and several Volvos, including FWD 1.9-2.0 litre 1000hp V40s. All over 200mph.

 

Hi Avos,

What octane rating fuel are you using with this setup? What is the boost?

With that flat torque curve at the top and given that the N/A version of this engine has the rev limiter at almost 7000 RPM (supposedly the S/C one limited to 6250 because of the Eaton being already at the limit) do you think about increasing the the rev limiter? That should get you close to 800 hp and if the TCM could be reprogrammed, the upshift will find the engine in better revs...

 

Iirc it was about 23ish psi, and I use 98 Ron here (EU).

The flat line indeed suggests some easy extra gains by increasing the RPM, and I have tried to do this is in past (so of course both ECU and TCM), but haven't been successful and have left that idea.

 

I have been looking into what can be done to up the RMP limit of the engine.
The stock engine has a nodular iron crank and rods. A lot of published data has stated you shouldn't push over 550hp with nodular iron cranks. Avos has gone well past this, but I believe he babies his engine as much as possible.
I believe that the Count has stated that the present RPM limit is due to how the engine is balanced. These engines use a 6 counter weight crank. (Aston Martin used a fully counterbalanced crank. )

Therefore if you want to build up a reliable higher rpm engine, you need to put in a billet crank, fully counterbalanced, with forged rods. Then balance all the rotating parts for the RPM you plan to run.

Nobody on the forum has wanted to spend this much money to gain another 500 to 1000 rpm rev limit. I am thinking about it on paper, but don't really want to spend the money.

 

I have gone the way you mentioned in the last section, but not sure if ever go for 7K since the engine is a stroker and piston speed already higher than with stock 4.0/4.2 stroke. All internals as well as lower pulley and drive plate are balanced.

 

Forgot to ask. Did you use a stock crankshaft or have a billet one machined?

 

Forged steel.

 

Babies in the sense that I don't race it on a track, nor any other continues power levels, all is street driving and only full power wots once the oil is on temp. I do more than a couple of wots a day, and sometimes trash it really for many more, not so much 1st gear take offs as that is killing on the diff, but plenty in higher gears. I am also using sharp timing/fuelling, which makes it even more trashy ;-). During the winter I switched back to about 585 rwhp which I am still on now to have a slightly more lower supercharger noise as the 2.6" upper pulley does make it noisier to my taste as I drive just to much, but that translates in more/longer wots again.

In other words, am not really babying, and am actually a couple of steps ahead of what I mention to others to provide some room in my experiences, but of course I don't have the budget to test for all circumstances/extreme conditions, only that will test the tolerances of al parts ....