cosrep

I know vtec engines have a reputation for being very tough but they cant change the laws of physics can they?

I was just browsing on ebay motors and came across a stroker kit for a turbocharged vtec lump. It takes the capacity up to 2.0 litres which is fine.
They then claim its rated up to 900hp and its possible that the engine can still handle 9500rpm running between 9.9 and 12.4 CR @ up to 30psi.

All this on American petrol - 90octane crap?

Would the engine not simply detonate its self to pieces?

tabetha

The clue is in the detail up to 30psi so it's forced induction, stroker kit no doubt has rods pistons as hoda stuff will not do this power, as well as cams, basically a whole new engine bar a few nuts and bolts.
How long will it last, they won't say!!, vetec good lump but if only a stroker kit not a hope IMO, and the description CAN run up to 900bhp, yes with lots of other stuff as well and all for one 1/4mile run!!
tabetha

dox

over here the honda vtec turbo conversions are very popular,
a vtec turbo is my next build after the cossie is finished.
my mate owns a 1991 eg honda civic with a b18c engine conversion
coupled up to a t3/4 turbo charger holding 20 psi making over 350kw at the wheels an revs well over 9000rpm , with that sort of power in a shell that ways a mere 900kg
it would have to be one of the fastest 4 cylider cars ive ever been in an would eat my stage3 saph for breakfst. so far the engine has done 10k on the freash rebuild and is still going strong.

imo honda engines are way more advanced then any other production
engine i have seen, especially the k-series (k20a engine)
these produce 200hp from a natural aspirated lump with no aid from a turbo an love to be revd over 9000rpm

ive seen a few n/a hondas here pull away from bigger cars like the z06
corvettes from a 30mph rolling start. sure the vette got it at about 120mph but i would be happy with my n/a 4cyl chewing up a suposely
american supercar lol.

if any wants to build a turbo honda i would say go for it
cheap,pleanty of parts,easy to work on, extremely fast an reliable.

pleanty of vids on you tube to see what they go like

Fastmaul

The only flaw with that is I've seen plenty of little Honda's put on a turbo kit (without anything else) and they almost always end up blowing up their engines.

It also doesn't take a scientist to understand that a car the weight of a tin car with good HP is going to be quicker than a heavier car with equal or more HP. Put a Vette engine in the honda against the same 4cyl Turbo and let me know the outcome.

Honda's are all over the place here like roaches.. and the chavs that own them are so fecking annoying. You're more likely to find a riced out chaved out Honda then a good built one. here at least.

oh yeah.. I've almost NEVER seen a N/A Honda eat up a Z06! You must be running super high compression?

cosrep

I just dont understand how a vtec lump or any other for that matter could handle even a 9.9 CR @ 30psi on 90 octane fuel!

xr_craig

iTrader: (2)

I'd imagine that somewhere they state that, to run 'up to 900bhp' you need race fuel something like that

205T16

Remember the octane rating for US fuel is calculated differently compared to the UK. Like ours is RON and theirs is (RON+MON)/2 or something.

dox

yeah 30psi at a comp ratio of 9.9 is way to much, most of the vtec turbo
lumps ive seen running at std compression ratios, run at about
0.5 bar boost. most guys here build thier vtec turbo lumps with a comp ratio of 9.0 an run 20psi an maybe a little more.

my mates is running 9.0 with 20+psi boost making 350+kilowatts at the
wheels it cleans up most things, it can pretty much smoke the
wheels all the way down the 400 meters

costina

iTrader: (1)

Please remember a HONDA engine K20 for example is all about revs it may have 197 bhp BUT only 147 nm of torque

Thats why they are reliable is std form.......

IF it produced the same amount of torque it would last as long as any other engine......

Hence light bodys to compensate less torque..