opinions please

[84z31]

alright it may be a little while before i can afford to swap something in my car.

 

i currently have an 84' 300z NA. the motor runs perfect. unfortunalty it leaves me looking for more power. it seems to me that parts are hard to get to make it go faster. i would like to drag race the car.

 

my opinions are for either turboing the vg30e.

 

installing toyota supra 3.0 7mgte

 

or maybe a rb26 turbo.

 

i have swapped and wired motors before. check out my toyota truck i sold to my brother. http://www.cardomain.com/ride/692620. it was a 5mge. it made a hell of a difference and the power was awesome!

 

whats the best for parts suppliers and ability to modify. i'm not sure i want to keep the v6. i really like straight 6 torque and power. it seems they are just built better.

[84z31]

5mge

[84z31]

side

[Dave88SS]

if money is tight, just turbo the NA engine:

 

http://www.redz31.com/pages/turbo.html

[mtcookson]

i really like straight 6 torque and power. it seems they are just built better.

 

 

That's something I've never really understood. Most of the dyno comparisons I've seen of I6's to V6's showed the V6 producing a lot of torque in the mid-range while the I6 made most of it up high.

 

In that particular case, it would seem the V6 would be the way to go for drag racing.

[260DET]

VG30ET, VG33E turbo, VG30DETT, VG30DET.

 

Depends a lot on which engine and parts are available at the right price because all the above can deliver big power. Then there are the Nissan V8's, great engines, better than Toyota/Lexus.

[84z31]

yeah toyota v8s suck. the tundra should have way more power. i think toyota really detunes there motors. not to mention how hard it it to get computer modifications.

 

i really like the I6. the reason i like them is because the power curve is pretty flat. you have strong torque through the whole rpm range. thats what i really liked about the supra motor. not to mention how open it is on each side compared to the tight fit of the v6.

 

you really think the V6 will be a better drag racing motor.

[mtcookson]

Comparing all of the engines mentioned: VG30ET, VG30DETT, VG33E w/turbo, VG30DET, 7MGTE, RB26DETT, or possible Nissan's V8 the VH45DE w/turbo I'd probably rank them like this for drag racing:

 

VH45DE w/turbo

VG30DETT/VG30DET

RB26DETT

7MGTE (don't know much about these, but from what I can find they seem to be able to make good hp and torque... i always hear complaints about headgaskets though)

VG33E(T)

VG30ET

 

The VH45DE I've talked a lot about on this forum and it is simply one badass engine. Its nearly race built from the factory and is extremely strong. With minimal modifications it can make some awesome power and if it was fully built... I'd be scared to see what kind of power it could make.

 

The VG30DETT/DET for a long while has held most of Nissan engines' records for top speed, power output, 1/4 mile, etc. Only recently was the 1/4 mile record broken that we know of by a VQ35DE-TT. It can make some incredible power when built up and is an absolute torque monster. There's a website with some dyno's of a VG30DETT compared to a RB26DETT. Both are pretty much equally modded. The RB26 made 13.4 hp more than the VG coming in at 759.9 rwhp @ 7,820 rpm. The VG30DETT made 746.5 rwhp @ 6,550 rpm.

 

The torque is the biggest difference. The RB26 came in at 543.2 ft. lb. torque @ 7,000 rpm. The VG made... 865.8 ft. lb. torque @ 4,550 rpm. That's a difference of 322.6 ft. lb. of torque. As my brother put it so well "horsepower is for braggin', torque is for draggin'".

 

The other VG's are very capable engines too. They're incredible strong and can make gobs of torque. Their only downfall is they're SOHC so they won't breath as well on the top end. That doesn't however keep them from being used in race cars. There's a guy with a Z31 running in the upper 7's using a SOHC VG. Electromotive also built some VG30ET's for some of the Nissan race cars. They used the stock block and heads (i.e. no recasting) and made upwards of 1200+ hp for qualifying and 900 hp for the races. They're definitely some potent engines and can do just about whatever you need.

 

Size wise, the V6's are definitely wider but it all just depends on how the engine bay is designed. They're wider, but shorter both height and length wise. The I6's are much thinner, but are usually quite tall and quite long. They each have their pros and cons though and in the end, its really up to what you want.

[260DET]

For the JDM* the VG30DE was fitted to some later model Z31's so for the engine itself fit obviously would not be a problem, don't know how the VG30DETT would go, single turbo VG30DET may be a better fit.

 

The Toyota 7m is problematical so my Toy-boy-ota mates say.

 

* registered rice trade mark

[84z31]

the 7mge has head gasket failure issues. only due to toyota not tightening the head down enough. if you torque the head to the specification in toyota service bullitens then it won't be a problem.

[84z31]

has anyone intstalled a vh45de in there car. are there any links. i'd really like to see them.

 

thanks

 

and are there any links available to the vg30dett?

[mtcookson]

I'm working on putting a VH45 into my 280Z right now. They are incredible engines with tons of potential that hasn't hardly been tapped yet by anyone. They've recently started to get modded much more it seems. I think the one that probably started the big spark on the VH's is the blue Z with the twin turbo VH45. - http://www.zparts.com/showcase/engines/pages/q45v8z-testfit.html