why doesnt it feel the same

[escortman]

my mate just bought a ae92 levin 1987 redtop with tvis not sure if its small port or big, i drove it the otherday and that tvis doesnt seem to have as much kick as my ae82 bluetop , mine is auto could this be the reason. i remember hearing from someone the butterflies in the manifold may not be working fully ??

[Silent Knight]

It could be the weight difference from those cars might cause it to feel less powerfull....?

[escortman]

hmmm spose didnt think there would be much diff in weight, lik his feels lik wat mine is with a car full

[Bling]

done a compression test?

[Silent Knight]

I just re-read....one is a bluetop and the other a redtop.
That could be it....they feel different because they are not the same engine...

[sergei]

Or maybe TVIS Acutator has cracked membrane and there is no transition becuase of TVIS is open all the time.

[Adydas]

Its not excatly fair to mesure 2 differnt cars by how they " Feel ".

Go do 2 dynos, then ya know.

[soopachargen]

or it could be that the tvis bluetop is superior to the tvis redtop:P

[Adamal]

ae92 levin 1987 redtop with tvis not sure if its small port or big

Small port had no need for TVIS.

Cams are *slightly* longer duration and *slightly* increased lift in the TVIS bluetop over the TVIS redtop. What the exact figures are, I don't know.

The compression is the same in the bigports aren't they? And higher compression in the small port redtop to 10:1.

Its probably in the FAQ section, but can't be bothered looking in there right now

[escortman]

or it could be that the tvis bluetop is superior to the tvis redtop:P

is that true or ur jus been a ass

[soopachargen]

or it could be that the tvis bluetop is superior to the tvis redtop:P

is that true or ur jus been a ass

bit of both. i too have driven/owned both. the redtop was very disapointing after the bluetop. i've only sampled one of each of these motors so its not a fair test but the bluetop definately felt a lot stronger, happier to rev etc. at the time i put it down to maybe the redtop having stronger/heavier rods so the bluetop could rev freer. this is all opinion so take it however you want.

[RedMist]

Gentlemen, need I remind you that you are talking about 20 year old engines. Stating that one redtop is superior to a bluetop and then using it as a generic rule is bordering on stupidity.
One may out perform the other in this circumstance. Or may not depending on how accurate your butt dyno is. Your bluetop may just have more induction roar which makes you think its quicker. Or perhaps the redtop is down on compression.

Who knows, and without more information anyone posting a reply is simply speculating without any scientific proof.

The cam duration is slightly longer in the bluetop. Which should produce slightly more up end HP, and possibly slightly less mid range. However its not nearly half enough to get over the parasitic losses in your auto tranny.

[Loudtoy]

Gentlemen, need I remind you that you are talking about 20 year old engines. Stating that one redtop is superior to a bluetop and then using it as a generic rule is bordering on stupidity.
One may out perform the other in this circumstance. Or may not depending on how accurate your butt dyno is. Your bluetop may just have more induction roar which makes you think its quicker. Or perhaps the redtop is down on compression.

Who knows, and without more information anyone posting a reply is simply speculating without any scientific proof.

The cam duration is slightly longer in the bluetop. Which should produce slightly more up end HP, and possibly slightly less mid range. However its not nearly half enough to get over the parasitic losses in your auto tranny.

Lol very true but reading "parasitic losses" made me think of many squashed bugs being used as auto tranny fluid